ahead on our special series "today's" journey to secret kingdoms, we're going to travel to the real timbucktut duke university, a joke between girlfriends just sparked a national debate about men, women and sex. >> i had the best time of my life last night, twice and once this morning. >> reporter: men have been getting away with it for years, bragging about their sexual conquests. the ladds can play that game too. karen was a student at duke, just graduated and wrote this 42-page december siration about -- no secrets here, karen used their names and shirtless pictures. we're hiding their identities. karen ranked the men by physical attractiveness, talents, creativity and aggressiveness. >> at first i was pretty excited when i saw it. i was like, good for her, this is awesome. >> reporter: karen wrote this about a duke lacrosse player, experience was on his side and he used it. and another man, he was terrible, don't even bother to kiss me more than a few seconds. karen meant the sex list only for her friends, but it made the rounds. this girl gets a fist pump and then some from me, one woman