When I was in second grade or so, there was this very popular joke, where you would ask someone to spell I Cup. They would then say I-C-U-P which sounds like "I See You Pee" to which you would then respond thats gross or something like that and laughter among everyone within earshot would ensue. There where countless other jokes like that, and Britney Spears has made a song using one of them. Britney (or more accurately her songwriters) wrote a song called "If You See Amy" for her new album which if you say it real fast sounds like you are saying... well just listen: http://www.youtube.com/watch?v=nWyXO4MJBq0