To be fair, though, I think that's largely to do with it being porn. Like, sometimes people go for realism, but that's usually in comedy as opposed to stuff that's straight-up aimed at titillation. I mean, my sub!POV stuff doesn't have the specific kinds of uncertainty I would have, at least not usually, for the same reason everyone can deepthroat in smut unless it's virgin!fic.

In one fic, I had dom!Ron try to whip Draco once then give up on it cos he couldn't control it, but that was a characterisation moment - and afterwards he was right back to a particular kind of messed-up domliness.