I made up this joke while I was dreaming. I dreamed I was on the David Letterman show as the guest comic (this was years ago) and this was my first joke. (I heard crickets in the audience after I landed the punch line, Dave said ""goodnight everybody!"" and the credits ran) ""You know when people say dreams are real? Like outside stimulation effects your dreams? You know, if you dream you're being eaten by a sabertooth tiger, it's most likely your cat licking your foot? Stimulation like that. Well I had this dream that I went to my catholic high school reunion, and for some reason everyone was dressed in their school uniforms. Well there I was making out with a girl I used to have a crush on, and I reached down to stroke her legs and thighs, and for some reason they were really hairy. So at that moment I wasn't sure if I was just feeling my own leg while I slept, or if it was just my fathers.""