Think about it. Denizens of the 'Net (like me) are often stereotyped as having a greater sex drive than average. Most people would probably chalk this up to the largely 18-24 male demographic, but I think it's inherent in the structure of the Internet itself.
The Web is a funny place. If you search for beauty, you find cosmetics. If you search for love, you find dating. If you search for sex, you find pornography.		This makes sense, though, once you realize that the Internet is not (as it was intended to be) an worldwide library or instantaneous encyclopedia. It's every person on earth, continuously screaming at every other person. As such, everyone is out to make a buck, and pornography is one of the only effective ways to do that. It has been estimated that, at one point, nearly half of the Internet was devoted to porn.
If you want porn, you can find porn. At any given time, no matter what you're doing, you are always four keystrokes away from pictures, stories, chat lines, movies and paraphernalia chiefly concerned with copulation. I think, then, that the psychological pressure of having porn at one's beck and call artificically drives up the libido.