Thought exercise: The only reason why this is gross is because it's not sexual. Think about it, we do things during sex that are otherwise incredibly gross in everyday situations. Ladies, would you stick a finger up your ass and lick it at work? Nope. But I'm sure some of you don't hesitate with ass-to-mouth to finish off your man.
Sorry to be so crass, but c'mon...we all know it's the truth.
Hats off to your alternative perspective, it certainly gave me a chuckle. But I don't think many women enjoy ATM.