Thrusting your shaft into the bung hole of another creature such as a man, woman or a horse. Unlike the vagina, the bung hole does not self lubricate when one is horny and ready for action so many people choose a artificial form of lubrication such as K-Y jelly, butter, soap, olive oil, spit or diarhea. one may also violently shove his man rod into the bung hole without using lube thus creating a better challenge and some blood.

When peter decides to take the dirt road home.

The study of grass-tufted squares of earth, usually placed on a horizontal plane in order to create a lawn, ballfield, or park.

Any act of 'abnormal' or 'unnatural' intercourse, especially anal intercourse or bestiality.

A form of temple prostitution. Religious bigots tend to misuse this word to mean gay anal sex. Sorry it's not. I've checked my sources and it means temple prostitution.

the insertion of the male member into the anus of another human or animal

Any sexual intercourse that is not male to female, vaginal penetration, done misionary style. Anel penetration being only one example and the only for that is labeled and demonized.