To completely answer that question, we would have to delve into the difference between male homosexual behavior, and that of female homosexual behavior.
But to sum it up, male homosexual behavior is far, far, far, far more dangerous and likely to spread disease than is female homosexual behavior.
If you really want the details of the how and why, i'll tell you, but a lot of people would find the conversation off-putting.
I guess I still need some help, because you again refer to female homosexual behavior and I am wondering about females having anal sex with males. I just don’t get that there is a difference between sodomy performed on a male or a female.