Rimming is a form or anal-oral play also known as rim-job, tossing the salad, analingus, the brown kiss and 87. It describes the licking, kissing and/or penetration of the anus with lips or tongue.
As with other forms of anal sex, cleanliness is very important. The transmission of STDs is rare but possible. A piece of plastic wrap or some dental damn can be used as a barrier.
Rimming is commonly viewed as a gay practice but people of all sexual orientations.