Even though it wasn't there, one of my all time favorites...
 

Whn I was in college I had a freind who used to write a "word of wisdom" on the message board on the front of his door each day. One day it said "When engaging in Aural Sex -- play it by ear."

I thought that was hysterical and to this day 15 or so years later I still laugh when I think about it.

Paul