Christ above, I don't know what anybody sees in them. They make me yawn and change channel (not that I've ever seen one). They're about sex-mad idiots that obviously don't "get it" at home and just get together with strangers, and get paid for it at the same time. I can think of better ways to spend my time, like housework.
Actually, SavageMonkey, try the MTV music channels. A lots of the videos are porno. Look at Christina Agueilera and Britney Spears videos - they're about as tacky as you get.