I hate to bring it up, but anal sex is said to be very prevalent among hetrosexuals. It's another thing I don't hear much about among people who rail about anal sex. (I'm not implying that you do)
I just don't see the attraction, especially when a wholesome alternative is but a "taint" away, but to each his own.
Well, anal sex is a way of having something sorta like sex without getting a woman pregnant. And in some cultures that's probably the reason for its popularity. Unfortunately, if the lack of pregnancy risk leads to an acceptance of promiscuous anal sex (whether homo or hetro) diseases like AIDS may spread like wildfire.