There are some psychological factors to consider as well.
Some people find it exciting because they are doing something dirty and taboo.
Some women have told me that they get pleasure from knowing that they are pleasing their partner.
If this nerves are stimulated properly, they can produce "extreme pleasure." On the other hand, if stimulated wrong, they can cause extreme pain.
Generally the pain is caused by anal tension during sex.
I think that the women who enjoy it are women that knew themselves what they were doing or tried it the first few times with some one that knew what he was doing.
Anal sex is NOT something that you can just jump into, like they make it appear in porn movies. I've tried it with most of my ex girlfriends and all have liked it a lot.
why do some women like anal sex and like to have penises sticked in the *** instead of having them sticked in the right place, that is in *****???
What's the pleasure knowing that there is no erogenous zone in rectum ?
I've met some women, a hand full, not a lot, that do enjoy anal sex more than vaginal sex.
Other women like it but as an occasional practice instead of the norm. I read in a book written by proctologist, that said that about half the nerves in the pelvic region end around the anal area.
In addition, some men enjoy being penetrated themselves by their partner, and I'm not talking about gay men, I'm talking about straight men.
The men's g-spot (the prostate) is located within a few inches from the anal opening.
When the prostate is massaged right (by the use of fingers, a penis, dildo, vibrator, etc.), it can feel very good and even induce an orgasm.