a fairly new porn manuever in which the male star penetrates the woman anally, then pulls out and makes her suck his schlong, thus tasting her own ass. Finally, the man pulls out and completes the trifecta of disgusting by shooting his load on the woman's face.
Diane didn't think that she would ever be able to taste her own ass until Bill completed the rarely seen ass to mouthfacial.
A very special type of ritual, thought by many to be a myth, to summon the spirit of the devil. The ritual is performed by two partners, one male the other female. They both have to engage in anal sex until the male is primed for ejaculation. After priming has occurred, the male will quickly pull out and proceed to blow his load in the female's mouth while chanting under his breath, "ATMR" continuously until the female has completely swallowed the semen.
John - "Hey, can you come tonight to watch the football?"
Mike - "Sorry dude, I made a promise to my girlfriend that we were gonna do an ass to mouth ritual tonight..."
John - "Again?! *sigh* OK."
This person is a fucking idiot because A: this is retarded and B: ass to mouth is for when you're fucking a whore in the ass & slam your dick down her throat right after.
Methane isn't converted to carbon dioxide because CO2 is the byproduct of aerobic respiration, which involves OXYGYEN not METHANE you stupid ass fuck. ass to mouth conversion, ha.