Honestly, I think it's an all or nothing type of deal. I don't think the general audience just goes "and after 30 hours of vanilla sex, someone pissed in somene else's mouth. AWESOME!". Most likely you'll get outrage from most people, and virtually no praise for people who are into that.
Me? I'm into that shit. In one of my favorite games, Defending Lyda Coller or some such. My brain doesn't do names. You can date this super cute ex stripper cop girl and have a wholesome relationship. Very cool, well wriiten. Nice. I like it.
Or you can turn her into a bimbo, force her to have breast enlargment surgery. Make her lick the floor of your car, throw a credit card in the toilet and have her dig it out of her own poop using nothing but her mouth. It is, and I can't say this enough, fucking amazing. Out of this world. Yes! MORE OF THAT.
It's perfectly fine, because you have a corruption path where you take her down this spiral of depravity, and it's awesome. But now think of this in a what would otherwise be a vanilla game. And out of nowhere, tongue fishing in poop. Do you think that would go well?
But why the poop example? Well, if you're considering watersports, you are probably not disgusted by it. But even someone like me, who is into scat, can look at it and say "yeaaaah, that's obviously disgusting and horrible". So I raised the stakes.
There are people, like me, who live for that shit (heh, pun). I actively look for games like that. I play every shitty Miel game that comes out, not because they're good. But because I know, my man, my dude, MC, will piss in every slut he ever meets. But the vast majority just wants nicely animated doggy-style and be fine with it. Maybe some daring wall-pinning action as a crescendo.
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What I'm trying to say. It's off-putting for people not into it. And it's disappointing for people who are really into it (because there's not enough, no escalation, no downward spiral). Either go full hog or simply avoid.