It seems pretty obvious to me. The male g-spot is located in the anus, and that explains why men always want to take it in the bum.
I joke. I joke. Butt on a more serious note, I did a quick Wikipedia search on male to female anal sex. (The link is a little NSFW.) Wikipedia cites how the anus is often tighter than the vagina. They also cite how anal may be desirable simply because it is exotic or forbidden.
Tangential information: Wikipedia also cites how female to male anal sex (aka pegging) is often seen as feminine or gay, despite the fact that it is also an exotic act. (This may have been what specialagentjesus was thinking about when he asked if anal was gay.) My personal opinion is that more men should be open to pegging, as they may find they enjoy it.
It's a form of anal sex where the woman puts on a strap-on, then inserts it into a man's anus. Men often enjoy the act because their prostate (sometimes referred to as the male g-spot) is stimulated.
I joke. I joke. Butt on a more serious note, I did a quick Wikipedia search on male to female anal sex. (The link is a little NSFW.) Wikipedia cites how the anus is often tighter than the vagina. They also cite how anal may be desirable simply because it is exotic or forbidden.
Tangential information: Wikipedia also cites how female to male anal sex (aka pegging) is often seen as feminine or gay, despite the fact that it is also an exotic act. (This may have been what specialagentjesus was thinking about when he asked if anal was gay.) My personal opinion is that more men should be open to pegging, as they may find they enjoy it.