Anal sex, straight or gay, is inherently unhealthy. The human bowel is loaded with truly massive amounts of bacteria, and intimate contact with it is by definition bad for your health. AIDS did not create the unhealthy nature of gay sex, it just added to it.
One of the funniest things I ever read was by a liberal minister who wrote an entire essay about how our “prejudice” against this type of sexual activity and this part of the body was merely a stereotype.
As if bacteria and parasites can be bullied into being politically correct in the same way people can.
And they call themselves “the reality-based community!”
You hear very little about these outside of specialty medical journals because it isn’t politically correct to discuss the huge number of health problems caused by homosexual behavior, especially when promiscuous. AIDS is the only one talked about, and the normal spin on it implies that it is somehow Reagan’s fault.
Ah, I see now. Yes, it's true: rarely do we hear about the sanitary aspect of anal sex.
It is also true, by the way, that a large minority of self-identified homosexual men do not engage in anal sex, probably for the reasons you have cited.
The problem with the left's vision for "comprehensive" sex education is that there is no way not to have a slant against sexual behavior that was once (and still is in some sectors of society) considered deviant--and I am referring to everything from sodomy to oral to abortion to even many contraceptives--if you are totally objective about what those things actually are and what are the consequences or potential pitfalls.