The sexiest athletes bare it all. From gold medal olympians to this dancing with the stars darling. We go behind the scenes for an inside look at this years espn the magazine body issue. First, nightline five. Number one in 60 seconds. Good evening and thanks for joining us. As we enter the height of this hot, humid summer, more and more of us will be heading to the beach. But its not just more swimmers. There are also more sharks than ever near our shores. Tonight after one man nearly dies in the jaws of a great white, a new warning from the california city, a 60day fishing prohibition, while they investigate the latest attack. Heres abcs nick watts. Get out of the water shark reporter this shaky video shot from the pier captures the terrifying moment a shark thrashing, then steve robles screams. His morning swim turned into a nightmare. Shark attack on a busy beach, july fourth weekend. You saw it coming at you. It made a real fast, sharp left turn and lunged right at my chest. You could just hear everything crunch. Reporter people on land realized what just happened. Oh [ bleep ] reporter fellow swimmers and surfers got robles ashore on this bloody surfboard. And i was screaming and screaming. And crying and screaming. And i was holding on to my cut. Reporter the horrifying wounds left behind. The shark, a seven or eightfoot juvenile, was mad. Right here reporter hed been hit by a fisherman on the pier when steve, a longdistance swimmer, got in the way. I grabbed its nose with this hand. And tried to pry it off of my chest. I was staring at the shark eyeball to eyeball, literally like right here. It was the most frightening thing i ever anyone could ever experience. Reporter he punched the shark in the nose a bit bit onc more and disappeared. What was going through your mind . I didnt want to die. Just i was scared. I was i was panicked. Dont worry, dont worry, its over. Reporter at Manhattan Beach sharks are spotted nearly every day by audacious paddle boarders. This is the first time one has attacked here. New studies show the great white population is increasing on both coasts. Conservation efforts are working. In fact, the great white population in american waters is up 42 since 1997. And so are sightings. Last week, a 12footer was spotted off a cape cod vacation spot. Days earlier an 18footer spotted by fishermen just a few mile away. Shark attacks are still extremely rare. There were just 47 in american waters last year, only one fatality. Throughout the world its actually very rare, considering how many people enter the water, to how many times the great whites actually swim by. Very, very, very rare. Reporter your odds of getting killed by a shark at the beach are 200 million to 1. Sharks, we are not on their menu. Reporter how best to avoid being the next steve robles . The golden rule dont be an idiot. Do not an tag news a shark. You dont bother them, chances are they will not bother you. But more and more it seems people are taking chances with sharks. Just to get a glimpse or even a closeup encounter. Youtube is filled with amateur videos like this. [ bleep ]. Hes checking me out. Whoo oh my god, right under the board. Reporter paddle boarders chasing sharks with cam rath right here at Manhattan Beach where robles just got bit. We saw a big, dark shape. Yep, here he is. Reporter surfers armed with go pros risking their safety for video proof of their adventures. Thats a beautiful shark, wow. Reporter theres even an annual event from discovery shark week fueling our fascinati fascination. Heres a young great white in one of their upcoming specials. Similar to the one robles encountered. Juveniles, but theyre going for these birds that are on the surface. Reporter its believed these juveniles come to the surface for hunting practice. Shark mania as it were has spawned a new crop of shark junkies drawn to the danger and thrill. Sean harrington is trying to create a viral video to promote his clothing line and he admits it went a bit wrong. I seen the shark coming for me, i just threw the bird cage behind my legs and pretty much just saved me from probably grabbing my legs. Ive got to thank the bird cage, really. Reporter check out this florida teen who hitched a ride on a whale shark last summer. I decided that, you know what, i should maybe try and swim with him. Because i might not be able to do it ever again. Youre [ bleep ] crazy. Reporter this is a nantucket fisherman who grabbed a 200pound sand shark in the surf. I think people just kind oftc it seems wild, running into the water and grabbing a shark by its tail. Reporter theres a whole new industry, shark tourism, worth 300 million a year and growing. I went cage driving with great whites in africa a couple of years ago but even thats old hat these days. Matt gutman went diving with tiger shark in the ba ham mays wearing nothing but a wet suit. What to do if on that rare occasion youre in fear of being ashacked by a shark . First up, if you see one and hes not lunging at you, swim calmly to shore. They go under surfers, we see them jump out of the water, nothing really happens. Reporter if the shark attacks fight back. Punch it on the nose like steve reasons d robles did. It was instinctive. It has all its electrical pulses in its nose. That will whack out the shark. Unfortunately, the teeth are close to the nose. Reporter if it bites, gouge at its gills andize. You have to keep a cool mind. If you can, thats the best way to do it. Reporter back to steve robles, he was just in the worst place at the worst time. Shark get out of the water reporter juvenile white dozen not attack humans. This apparently only the second recorded case. And robles doesnt blame the shark. He blames the fisher machine. It was that guy that was agitating that shark. That caused all this. Reporter many beachgoers this weekend agree with robles. Sounds like out of fear he attacked a person because he was scared for his life. Putting surfers lives in danger shouldnt be allowed. I think it should be banned. Reporter some eyewitnesses say theyve seen fishermen purposefully attracting sharks. Fishermen like to have the thrill of catching the fish. The big fish. The fighting of the fish. Reporter which takes us back to the golden rule. Dont antagonize them and chances are they wont attack you or anyone else. I just got really lucky. Im getting a second chance. Reporter for nightline, nick watt, abc news, Manhattan Beach, california. Next, the business of finding love is a multibillion dollar industry. What if the key to unlocking love is in your dna . Sexy athletes getting naked for this years espn the magazines body issue. Nobody told us to expect it. Intercourse thats painful due to menopausal changes. The problem isnt likely to go away. On its own. So its time we do something about it. And theres help. Premarin vaginal cream. A prescription that does what no overthecounter product was designed to do. It provides estrogens to help rebuild vaginal tissue and make intercourse more comfortable. Premarin vaginal cream treats vaginal changes due to menopause and moderatetosevere painful intercourse caused by these changes. Dont use premarin vaginal cream if youve had unusual bleeding, breast or uterine cancer, blood clots, liver problems, stroke or heart attack, are allergic to any of its ingredients or think youre pregnant. Side effects may include headache, pelvic pain, breast pain, vaginal bleeding and vaginitis. Estrogen may increase your chances of getting cancer of the uterus, strokes, blood clots or dementia, so use it for the shortest time based on goals and risks. Estrogen should not be used to prevent heart disease, heart attack, stroke or dementia. Ask your doctor about premarin vaginal cream. And go to premarinvaginalcream. Com this is worth talking about. [ cat meows ] dadadadada, bumda, bumda bumda, bumda the animals went in two by two the sheep and the frog and the kangaroo and they all went marching, marching in two by two [ male announcer ] the nissan pathfinder, with intuitive fourwheel drive. An adventure worth sharing. Nissan. Innovation that excites. From matchmakers to online dating, helping you find love is a huge business. What if the secret is something rooted in your dna . And theres actually a way to unlock it . Heres abes bianna golodryga. Reporter by the time Jessica Simpson and eric johnson walked down the aisle this weekend, we already knew they had great chemistry together. After all, theyve got two kids to prove it. Right . But the question is, do they have what it takes to Stay Together . Love, Everyone Wants it but not everyone finds it. Reporter even the millionaire matchmaker will tell you if he didnt have money tomorrow, would i date him . No, yawn, hed put me to sleep. Reporter money cant always buy you longlasting love. Mr. Serial dater. Likes all the candy in the candy store, cant decide what flavor to take home with you. Youre not a 10. Reporter what if the secret to knowing if mr. Right is more than just mr. Right now, is assism as this . Youre not a good spitter. Reporter what if in the search for compatibility its whats inside that counts . Way inside . Not just finding out that your relationship problems are actually in your genes and you can solve them. Reporter instant chemistry is one of the newest Matchmaking Services and its all based on the idea that your genes determine compatibility. Sounds good, right . We decided to put it to the test. Couple number one, meet maria and taso, both greekamerican and theyve been happily[n mard for five years. But it wasnt love at first sight. Honestly . I could not imagine my life with anyone else. But at the time, to me, he was just like your stereotypical greek man. Reporter now that she has two kids shes hoping she and taso are genetically destined to be. I guess im a little nervous. If it shows that were very much apart and we dont have a genetic makeup that would result in a fruitful partnership, you know. Then i guess i dont know. It makes me nervous. Not that it would be over. Couple number two, hagan and katie met the oldfashioned way. We met at the office. I came in as an intern. He was an adult intern. Reporter so far, most matchmaking methods havent impressed them. You can kind of cheat, like any personality test, but this is actually science. Reporter i couldnt resist dragging my own husband in for one more test. Ive done it all, from ancestral genetic testing to a facial recognition test to see if peter and i really were picture perfect. 63 is a pretty good number. That is a match. Great news for us, peter. Reporter what makes instant chemistry different thon all the rest . Usingn line dating its easy to look at the person and say whether theyre pretty. Theres no real way if youre going to tell if you have chemistry with them. Reporter thats why these happily married scientists created this business. When you hear the term chemistry you think of sparks flying. You dont necessarily think of your dna being compatible. It is these genes that are leading to that spark and that sort of physical attraction. Where are you, my little cabbage . Reporter pepe lepew may not have been far off. The idea behind skaent chemistry is our unique scents are what attracts us to each other. Were not just talking about perfume. That unique scent actually comes from genes in our immune system. And when it comes to those genes, opposites attract. If you have two people together with different immune systems and they have a child, the more diverse those genes are, the more chance the child has of withstanding different pathogens or infections. Reporter basically, just like in the rest of the animal kingdom, we are naturally driven to find someone that we can have the healthiest kids with. But we all know finding that Perfect Match isnt all that easy. These Scientists Say this is where instant chemistry can help. All it takes is a bit of spit. I guess im ready to spit. All right, great. Thank you for choosing instant chemistry. Spit until the amount of saliva reaches the fill line. Whoa. Fill line . Holy crap, thats a lot of saliva. Shouldnt do this the first time you meet somebody. Reporter at home my husband volunteered his dna. I hope this worked. Seal ship, done. Reporter now we wait. Our fate lies in its hands. Reporter for 200 any couple can get a testing kit delivered to their door. It includes a personality assessment. Instant chemistry has only been around since january. Through partnerships with Matchmaking Services they say their product has results in dozens of happily ever afters. But it is controversial. Some Scientists Say theres just not enough data out there to support their claims. Others say the test is bogus. There have been scientist hot said, of course your immune system and variabilities are going to be different, you come from different backgrounds. Theres published scientific papers that have shown couples who are more dissimilar in immune system are more lily attracted to one another. Reporter our scores are in. Drumroll, please. 98 genetic compatibility. That is crazy. Good to know. Glad i know. Its good also because we have two kids. So that means they have a good genetic makeup. Im very happy. Reporter katie and hagan . Oh genetic compatibility, 10 . Good thing they dont take it too seriously. So no kids . No kids, no kids. Just keep your genes to yourself. Reporter its our turn. All right, the big moments here, you ready . Of course im ready. Genetic compatibility is 60 for an overall average percentage of 64 . Although i do have to say most longlasting couples were found to have genetic compatibility higher than 74 , all hope is not lost. Ill take it. Reporter who cares about dna. Ill stick with the one ive got. Could be worse. Thats pretty good. Still in love . Yeah. Next, what do Michael Phelps, amy purdy, and Venus Williams have in common . You fifteen percent or more on huh, fiftcar insurance. Uld save yeah, Everybody Knows that. Well, did you know that playing cards with kenny rogers gets old pretty fast . You got to know when to holdem. Know when to fold em. Know when to walk away. Know when to run. You never count your money, when youre sitting at the ta. What . You get it . I get the gist, yeah. Geico. Fifteen minutes could save you fifteen percent or more on car insurance. If you suffer from constipation, you will likely also suffer from gas. Introducing new dulcogas, which starts working to eliminate gas bubbles in minutes for effective relief. Dulcogas, from the makers of dulcolax nothing relieves gas faster. They are the finest athlete of our time. Nfl stars to olympians. And theyre taking it all off. Why . Heres abcs linsey davis. Reporter it is, after all what we come into the world wearing. Our birthday suit. But when you put it on the cover of a magazine, it has the cover to shock, anger, intrigue, and sometimes inspire. Were not going out there just trying to be titillating, were trying to prove a point about the athletic form. Reporter espn the magazines sixth annual body issue, showcasing the worlds most elite athletes, all posing tastefully nude. It didnt easy getting star athletes to take their clothes off. Theyre human beings. As proud as they are of their bodies theyre still anxious about the idea of getting naked in front of people for a photo shoot. Reporter fivetime wimbledon champion Venus Williams recalls feeling a little shy. I was joking that i wish i would have like really just done 1,000 abs a day to compete with athletes that are just ripped. But im probably never going to be ripped. Im powerful on the court, thats all that matters. Reporter but soon they forget the cameras are even there. In the first two or three frames, the athletes forget theyre naked, they dont care that theyre Walking Around naked on set, it gets very comfortable very quickly. Reporter 18time olympic Gold MedalistMichael Phelps and dancing with the stars favorite amy purdy just some of the 22 athletes baring it all. 23yearold hawaiian surfer beauty coco ho ditches the wet suit and surfs naked. Sometimes its the thrill of the wave you get, the adrenaline of a really good barrel. Reporter not all the bodies are young athletes. 78yearold hall of fame golfer gary player was in last years issue. And this year, 49yearold light heavyweight World Champion bernard hopkins, the oldest title winner. Some of the photos have caused controversy. Last year tennis star radovanska was dropped from a Catholic Youth Group in poland for her immoral behavior. Something we feel is severely offensive, we have a conversation about it, then were glad its generating that conversation. For her she was proud of her pictures. Reporter most of the athletes are fearless on set. The standout star from this years shoot . Certain yeserga baka was ups werent more parts of his body to work out. Reporter whether on the field or on the set they come with their top game, ready to show the world what were really made of. For nightline im linsey davis in new york. Thanks for watching abc news. World news now is coming up soon with overnight breaking news. Tune into Good Morning America tomorrow. As always were online at abcnews. Com. [dramatic music] well hey whats up, baby . [cheers and applause] hello and welcome to millionaire. Today we are kicking off a really exciting week. Not only do our contestants have a shot at winning 1 million, but they can also win a Disney Cruise for four to the bahamas. Its millionaires cruise in and win week, yeah, what thats not all. Everyone watching at home has a shot at winning this cruise as well. So find out how later in the show. But first, lets take a look at this Disney Cruise line vacation that i know you and your family will love. Discover a magical Disney Cruise line vacation that everyone in the family will enjoy. Kids of all ages can enjoy their own immersive clubs. Even teens and tweens have their hangouts. While the kids enjoy their own adventures, adults can relax with some me time in special areas made just for them. 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