I think that with orgasms, we can't really tell either as it's even easier to fake. I mean Kaho Shibuya is my favorite, but I will be among the first to admit that her reactions and overall enthusiasm seem to be too much, to the point that you just feel that "yeah, she's just doing it for the porn". Of course, to really get into it as a woman, I think, you need to be either really comfortable with having sex in such conditions and be able to get your kicks
even then and there, or you need to be getting your kicks
because of these conditions. Both cases, I think, are quite rare. And even then, maybe that's how she it. Maybe that's how her body works and that's how she genuinely reacts*
That's why it's hard to tell: jizz looks more or less the same, but orgasms in general, especially in women... oh boy... I would bet a lot of money that there are
lots of women who, while having the most intense orgasms of their life, would be almost silent and their face would not reflect much of what they're going through, maybe just through bitten lips and closed eyes and red cheeks... they would be essentially spacing out of the real world, immersed into the experience. There might be just as many who are very active and vocal about it... But the point is the variety. Jizz can be more or less watery, more or less white, but it can be
too thick or too white (though, again, there are exceptions, but I think they are statistically rarer than the variation in orgasm behaviors in women). Genuine orgasms cannot be too loud or quiet maybe... I guess... but with Kaho, I'm still not convinced
* And even if her enthusiasm is fake/just for the porn, I still appreciate her performance a lot: she is one of the best not just in the tit department but also in the popping business as well (I mean, she might be not among the best deep-throaters but when she sucks you might almost always be expecting loud pops along the way). So, I maybe want to say that fake orgasms are not that much of a problem for me. But on the other hand, I do appreciate when there are signs that are hard or even impossible to fake like nipples getting hard and swollen, certain body areas becoming red... And again, sometimes, just the girl sweating a lot is really a turn-on... But fake jizz can ruin all of that close to 100% of the time