IT'S BECAUSE MEN THINK WE MIGHT TRICK THEM INTO RAISING ANOTHER MAN'S CHILD.
That's what is at the heart of this, and animal research bears this out. Human females have hidden fertility - nobody can tell when we are able to become pregnant. We are ALWAYS sexually available and often responsive and enthusiastic even when not fertile. This is not the case in most other animals and as a result you see considerably less sexual control and violence, even in typically violent species.
While heterosexual men enjoy this enthusiasm, they are deeply suspicious of it. They suspect that left to our own devices, we will be enthusiastic to EVERYONE and become pregnant with the uterus they consider reserved for their semen.
Further to that, until recently, there was no way of telling if the child a man was raising was his, his brother's or his neighbour's. The only way to ensure that it's his child is to control the magical tricksy vagina, and by necessity, the pesky 'person' attached to it.
COntrolling another person is difficult, and controlling an adult with equal rights to you is nigh impossible, so naturally it was recognised that women CAN'T be adults with equal rights to real people, otherwise how can we ever stop the constant flow of foreign semen into the vaginas women are inexplicably attached to?
Men are more hostile to male immigrants than female immigrants - they don't like the idea of foreign semen polluting the local baby holes.
Men like inexperience (youth, sometimes illegally young, virginal, 'first time' porn, cloistered/burkhas) and vulnerability (high heels, porn focusing on 'stranded teen' stories, impractical clothing) and high availability only to HIM.
It's incredibly easy to persuade a not very bright 19 year old to take their clothes off for money. We only see it being done to boys in gay porn. We see it done to girls all the time - and even when it's clear the woman in the pornography is considerably older than teenaged, she is 'advertised' as teenaged, like someone switching a use-by-date on a pear. We see it done by men, in short. And it's because youth, stupidity, vulnerability, it's all saleable, and it's saleable because it makes us controllable, and they want us controllable.
Women in their late thirties and early 40s are amongst the most despised women on Earth, especially Western women. Why? Just TRY and control us, that's why. And we're still fertile. We can put whatever baby we want into our uterus and they cannot stop us. And they hate us for it.