"- huh. I guess that's fair enough. Does this mean that you should not be doing kinkiness challenges, because Golarion doesn't have such a norm and adventurers tend to tell stories about what they've gotten up to."

"Eh.  New planet.  I'll get used to what's normal here.  Maybe don't spring it on me all at once and leave some for next time."

"Actually, I'm not quite sure what kind of perversion kinky is, I can tell it's, like, sexual diversity but the word doesn't directly translate.  Surprising me is fine, to be clear."

"I mean, it's sort of a general word for everything that's not, you know, one man and one woman with no implements and no magic."

"That covers an awful lot of space by itself, I would've said, but maybe I'm naive about how much more people get up to in their forties once they can afford nicer things and more participants."

"I mean, I think people who tend to like tying people up also tend to like whipping them also tend to like dripping candle wax on them also tend to like having two of 'em you can get to do things with each other and also tend to like using control spells on them, so it forms a sort of - natural category?" Shrug. "Maybe the category is just general the thing you are calling 'perversion'."

"Okay, haven't done any of that and if it ever got mentioned in the newspapers it was encrypted."

Wait WHAT.

"It'd have to go awfully wrong to get mentioned in the newspapers."

"Under other circumstances I'd say 'surprise me' but - what exactly is whipping?  What's a candle?  I can't quite make things out through this translation spell, but whipping sounds like pain and candles sound like fire.  I feel obliged to check that these activities won't require that we pay to resurrect each other afterwards."

"Whipping is painful but, like, in a sexy way, not in a deadly way. Candles are a tiny bit of fire, people who don't have magic use them for lighting, and their wax melts at a low temperature so they're also painful but a sexy amount not an injurious amount. We're - not even talking about things you'd need healing for, though people do in fact get into things you'd need healing for."

"Okay, and the concept is that you and I hire a member of some non-human species that... doesn't mind having it done to them?"

"It's going to be so fascinating to settle some bets among your research group.

 
Uh. Humans, are often into being hurt, in the context of sex, because pain is an intense experience and with the right surrounding context can be fun."

"...okay I checked in with my inner self and if there's some later stage of my life where I would want to be tied up and hurt in a sexual context, I haven't at all gone down the path that leads there.  In fact my self seems to be - sort of weirdly violently against that happening to me, to a degree greater than I'd expect from small amounts of pain?  I've paid pain costs in nonsexual contexts, but this was just like a very loud inner NOPE.  I hope that's not too disappointing."

"Men are more often the other way around, if anything, and it's the other way around we've got a betting pool on. Whether you like inflicting pain on interested parties in a sexual context. I have no idea how 'you were not aware that was a thing' cashes out, for that."

"I... don't see why men or women would want to be hurt, in terms of the human mind design and the reproductive pressures producing it that I'm familiar with... pain is the damage signal, it's the sum of what we avoid so that we won't die and fail to have children... are you someone who enjoys pain inflicted on you in a sexual context?"

" - point of theology, Cheliax conceives of pain as significantly more than just a - damage signal, not that being sexually into pain is limited to Cheliax or people who share our theology, or is even significantly more common here, I suspect it's innate. I have enjoyed pain in the context of sex, though the atmosphere matters a lot, you'd, ah, have to be good at it."

"Okay, let me check in with what my brain thinks of pulling your hair in a sexual context if you enjoyed that in a sexual way and YEP somebody just won their bets on me alright."

"Oh, good."

"Huh."

"I'm reasonably sure that dath ilan never wanted me to notice that about myself."

"...huh.

I guess dath ilan's really Good but that seems like one of the context where Good's just obnoxious."

"Stuff in dath ilan doesn't happen without a reason.  It's not Golarion.  Let me think about this."

Point one:  If the desire to inflict pain in a sexual context is sufficiently a human universal and sufficiently common that somebody on this plane of existence can spot the signs in Keltham before he knows them himself, the Keepers know about this already.  The probability of this need not be evaluated; it's a flat fact.

Point two:  Not only has Keltham not been told about this, Keltham has never been exposed to any sexual education or priming which would cause him to think, if he did notice this fact about himself, that it was a good idea to pursue that thought further.  People don't want to be hurt; that is sort of what hurting is.

Having a strong sexual desire to inflict pain, according to everything that dath ilan has taught Keltham about the world, would mean that any attempt to satisfy this desire would involve an unusually mentally resilient sex worker being paid a lot of money to put up with a sexual experience that she didn't like.  If he got addicted, if his whole sexuality turned into that, the rest of his romantic life would suck really hard and probably never be truly satisfying again.  That would have been the obvious prediction, going on the obvious-intuitive reasoning Keltham would have done from everything Civilization ever taught him.

The thought that the world was full of other people who were the complements of that desire, who wanted to be sexily hurt, would just straightforwardly have never occurred to Keltham at all, if he'd spotted that desire in himself.

That makes the answer obvious, doesn't it.

All he needs to do is guess, first, that Civilization prefers not to lie, and second, that natural selection in dath ilan worked the way it obviously-intuitively should.  By default, organisms don't like pain, and pain is what they don't like.

"Dath ilan has people who want to inflict pain sexually.  It doesn't have the people who want to be sexily hurt.  I'm not sure why they exist in Golarion, but whatever that reason was, it didn't operate in dath ilan.  That's why I was never supposed to notice."