[Zevonismymuse]

Anal sex does not spread any more diseases than any other sexual act.

Take an anatomy class. We are talking about going in the out door. This ALWAYS damages the tissue. And your comparison to vaginal sex is completely wrong. For one thing, unlike the anus, the vagina was designed for sexual intercourse and normally does not sustain injury during sex. Secondly, there is not normally bacteria in the vagina. There is normally bacteria in the rectum. Lots of bacteria, no matter how good of hygeine is practiced.

[mcg1969]

The walls of the rectum are significantly thinner than the walls of the vagina. (This makes perfect sense when you consider that the latter is designed to pass a baby's head, significantly larger than anything exiting the former.) As a result, anal sex much more frequently results in the damage of surrounding tissues than vaginal sex. This damage provides a means for foreign agents to enter the bloodstream. Thus it is actually quite logical that the likelihood of AIDS transmission during a single instance of vaginal intercourse is significantly lower than during a single instance of anal intercourse.

[mcg1969]

Sorry, I didn't quite reply correctly---as you can see, I actually agree with you on this :)