Article: Why do People Like Anal?
First of all, some people enjoy the “full” feeling that they get from anal sex. Because the anal sphincter (which is a fancy way of saying butthole) is smaller and tighter than the vaginal opening, the feeling of being penetrated there can be more intense experience. Additionally, in AFAB people, the rectum runs right alongside the vagina, with a thin layer of skin between them. That means that anal stimulation can also stimulate the vagina and even the internal parts of the clitoris. Basically, there are a bunch of different nerves down there that can feel really good when stimulated.
Other common reasons people might like anal are psychological. For some people, anal sex is still a “dirty” or “naughty” sex act — and that feeling of transgressing rules or boundaries turns them on. This is a really common sexual response, to the point of being cliché. (Think of the male CEO who visits a dominatrix for a clear representation of how breaking society’s rules can be a turn-on.)
And, finally, an AFAB person might like anal sex because they can’t get pregnant from it. For some people, taking that particular worry off their shoulders can be enough to heighten sexual arousal.