I'd say why those anal scenes exist, is because the LIs in question are really into them and if you want to have more action with those LIs you got to accomodate also their kinks. Where as when Kat asks you about it, is that she is asking if you were interested in anal with her.
MoonBox clearly wrote the LIs with having specific kinks and you can't exactly affect them much, or you end up skipping that LIs content.
Actually I removed that part because Kat asks him that In S2 not S1 and thats well after the cop and masseuse.
But it still doesn't really matter because he still ass fucks without us haveing a choice.
And it doesn't matter If Kat was asking about herself becuase "I'd rather not" would be an answere just to doing it with Kat.
But If the MC or anyone says "Thats not really something Im into" thats normally an indication he isn't into it and will try and avoid it no matter who it's with.
And yet he is still more than happy to do anal even without asking the girl first if she is into it or not.
Which seems at completely odds with the words "Thats not really something Im into" becuase despite what he said.
All the indications are If anything at all thats exactly what he's into.
But since it's seems its more than likely one of the Dev's kinks I'm not suprised there's no choice in it.
Although as I have already said I'm not that bothered since I can just fast forward past any of it.
Ofcorse I won't know whats being said at the time while I'm doing that.
But I won't really care anyway because it won't be anything interesting or important it there never really s in Sex scene's.
P.S. Atleast on the pluss side after getting cramp in my ctrl key finger on that extreamly long
ass fucking only scene after the forced blow job scene plane ride scene
(No I don't class the take it out her ass to stick it in her pussy only to instantly cum just to try and impregnated her at the end as counting as anything other than still a Ass fucking only scene) .
At least I could load back to the start of the flight and choose no to messing with karen and instead enjoy the quick sleep only scene before meeting aunty so thats a bonuss at least.