Yeah, I know that subject title sounds like a perfect straight line for an endless set of retorts from this crowd
But here's the issue: "Do you do anal?" or "Does she do anal?" or "Can I fuck you in every hole?" is too graphic of a question. You can get away with it in Asia more frequently than you can in the U.S. and Europe, but putting the question bluntly like that will still risk getting hung up on.
It's not the same problem when you ask, "Are you GFE?" No girl takes offence at that question (although she may or may not do the service), and when you think about it you're asking her if she will suck your cock bare, let you cum in her mouth, have multiple splooges on her tits/face/whatever. "Are you GFE?" just sounds so much more acceptable in polite company.
So, in an effort to improve the anal penetration ratio of all the brethren, what's a more acceptable way to ask a girl if she'll do the Trifecta?