sodomy
buggery
anal sex
anal intercourse

I remember every time he had the anal sex with me.

It was the only time we ever had anal sex.

She knew about anal sex, but it was something she'd never been asked to do.

John then turns her over and starts having anal sex.

As of 2011, this survey provides the most up to date data about anal sex at the population level.

Usually, he would offer them money and marijuana in exchange for anal sex.

The act of anal sex would not aid in conception.

I've never seen anal sex before, let alone between two men.

Anal sex is also possible in this position, along with use of a vibrator.

Anal sex is very far from being the last remaining taboo, of course.