JW wrote on Jul 10
th, 2014 at 11:43am:
Ass to mouth (commonly abbreviated as A2M or ATM) is a slang term primarily used to describe the withdrawal of a penis from the receptive partner's anus followed by the immediate insertion into the receptive partner's mouth. [1] A variant of this is known as ATOM (ass to other mouth) or ATOGM (ass to other girl's mouth) where the insertive partner removes his penis from one recipient's anus and inserts it into a second recipient's mouth.
Wow, learn something new every day....

People actually do this? Why?
What woman wants her, or another woman's, faecal matter in her mouth voluntarily and finds that arousing? That is seriously fucked up.
Halitosis Central right there.
Who thinks this shit up?
It sounds like the brains trust in the porn industry sits down and says, "alright fellas, we've got these orifices, these objects that will probably fit, and these scenarios, what can we do different this time round?"
Probably not too dissimilar to a Turdbine planning meeting I suspect.....