socks appeal of two americans president. >> reporter: so what does a former president get another former president who probably has everything? socks, and not just any socks, green ones which chocolate labradors. >> i like a colorful sock. i'm a sock man. >> reporter: a sock man spotted sporting everything from pink socks to lobster stocks, no wonder bill clinton is socking it to him. the two are close, like when they traveled to the tsunami together in south asia. >> i love george bush. >> and clinton knows bush loves socks, like these cactus ones. his collections have inspired headlines like all the president's socks. you think superman is for kids, check out the president's "superman" stocks worn on his 89th birthday.