Analingus. Tongue goes anus diving.
licking the anus with the tongue
The act of licking, sucking and inserting the tongue into the anus.
Using your tongue on someone else's anal area. Some people just go near the anal opening, and some people directly lick the anal opening.
giving oral sex of the anus.
oral-anal sex; sexual contact between one person's tongue and/or mouth and another person's anus.
The act of licking the anal rim of another person in order to gain and/or give sexual pleasure. (Also called a "rim job.")
Penetrating the anus with the tongue.
Anilingus: to stimulate the anus by kissing, licking and penetration with ones mouth or tongue.
penetration of anus with tongue
Anus stimulation with tongue.