@Burgerstein: I mean that the mechanical protection, where it's effectiveness is based on, offers the same protection for semen based infection, as it does for pregnancy.

Remember to put a condom on your tongue when you kiss, not just down there.

Purely out of interest, is there any difference in the risk of infection between anal and normal intercourse when in both cases a condom is used? Or in both cases when a condom isn't?

@Rath: Theoretically no. But when compared anal and vaginal intercourse, condom is more likely to break in anal intercourse.

When not using a condom, an infection is much more likely from a man to woman because of the semen and i'd say you're more likely to get HIV by giving oral sex than dipping your dick, if the skin is intact.

HIV doesn't seem to be the easilly spreding desease, but if you have other sex deceases, the likelyness of getting HIV increases, because the virus spread along with other deseases too.