Anyone has this strange feeling... that the writer of this game is actually corrupting You more so than it's MC.
This is like romance novels that make women "wet" in their minds, but you know, for men.
I don't know, this is genuinely the most perverted journey in any media so far (that i have tasted) and the fact that MC is sane and has it's doubts about it all is phycological very powerful.
I think that's one of, if not
the, main theme of the game, yes: will you make the MC a good guy or not? The last update makes it very clear the MC has a genuine sadistic streak that he's learned to bottle up. Kathleen offers him the chance to indulge that streak safely*, whereas Victoria taught him to suppress that streak for the good of those around him.
We get to choose which side the MC will land on, so yes, the question ultimately becomes about how much we want to see the kinky sex scenes. Of course, as I mentioned before, this does sort of hinge on how much you find these particular kinks sexy. If you find sadism and humiliation unpleasant, it's a bit like the Spanish Inquisition threatening someone with the comfy chair.
Still, it's a good dilemma. I am very curious to see if this winds up tying into the choice of the MC's psyche back at the start of the game (particularly the altruism vs lust option). There are a lot of cool (and a few scary) possibilities there. I suspect we'll have to wait for at least Chapter 3 Update 3 to see that come into play, but such is life. Patience is a virtue too, so hopefully we can at least get better at that one.
*Safely for Kat; for those around the MC, not so much.