My favorite is the image that most people have seen. It is of 2 boxes. The first is the male sex drive. there is a toggle switch for on.. and off. that's it. The femail box is covered with dozens of switches, dials, gears, etc.
Just tried to find a link, but Google is giving me all sorts of crap that I DONT want to see. Oh well. I am sure you all have laughed at the picture...