cave man talk for sex. that s what it seemed like. enough of this guy hitting me in the head tw the club because he wanted to eat the elephant meat. stopping specifically to grow wheat. not to eat, butç to make beer. so now the fateful decision. stay at home, work the fields, grow the wheat, put the beer on tap, or go play the field, well, the beer won out over easy sex. now monogamy rules the day to run the farm. christopher ryan is the author of sex at dawn. a book exploring the origins of human sexuality. professor, a pleasure to see you. i recognize the beer part comes for a different theory, but your basic theory is agriculture led to monogamy. can you explain it further for us? there was no need to really