I'd put my vote to the evolutionary psychologists and sociologists for that one.

1. Oral sex made a huge "boom" in popularity in the past century, particularly after the film Deepthroat, which was focused around a woman whose clitoris just happened to be located in her throat. That said, it is in no way "new"

I think the main thing about it is not, for most men, humiliation. I would posit that it's about the woman's enthusiasm and the ability to cover someone in cum in general. And let's me honest here, men love their cum. it's their magic power juice. makes them feel all big and strong. They don't want to be told that having it in your face is uncomfortable and distasteful and not fun at all. They, more or less, want to feel like you'd basically be willing to swim in it. *gleefully swan dives* Cumming on a woman's face may not be useful for procreation, but having a woman enjoy sex with you kind of is, and having her love your cum and want it inside you is kind of important to. Many of the sexual urges we have are there for biological reasons.

That said, we also can't forget that humans are one of the few animals on the face of the planet that have sex for fun. There are only a handful of others. There's not always a concrete reason why someone likes something and another person doesn't.

You can talk all day about how girls who have been raped or otherwise physically abused and also like rough sex like rough sex because of their abuse. For some of those women, that assumption may well be true. For others, it entirely will not be.

There are probably many places, previously mentioned Cosmo included, that have lots and lots of material on that sort of thing. Books too. And pseudo studies. However, I will warn that basically all of them will have little to no legitimate science behind them because there is very little research going on in that level of detail about the psychology of sex. I do not suggest you taking anything you read on the matter to heart.