I was going to answer this, but wanted to think about it first and then forgot about it. I have been very busy with my real life, and only come here to look for fires to put out.
At age 30, I was already living with the same woman I am now married to. I have to set the way back machine to my sexually active period, which was 1966-76. I have no idea what today's young women are like to date, but I have a 26 year old daughter and observed what a parent can see and gets told from her first date up through her last call this week.
One big thing, at least for middle class kids in the US, STDs were not a big problem and almost every girl was on the pill. And the Sexual Revolution was still in full swing, so girls were more willing to have casual sex, because the risks were lots lower. Young women were both more traditional and lots less adversarial with guys than today. My kid had both a t-shirt that said Chicks Rule printed on it, and a pair of panties that had Boyfriends Are Recyclable printed on her butt, and has a bit of contempt for men her age. You didn't see that sort of stuff in my day except from Feminists, who guys avoided like the plague. Other than that, women were and remain women. There is no standard type, but they have always been more emotional, instinctive, self serving, unpredictable, and weird by guy standards. I think there is more change in guys who are now, at least in the US, being raised to be ashamed of being men. In my day, the standard admonishment was to be a man, to bear your burdens gracefully, and to protect and care for women and the weak and infirm. Now young men are assumed to be born rapists, and they need to attend self confessional brainwashing sessions to cure their original sin of testosterone poisoning. I can't see how this isn't harmful to both men and women, and society as a whole.
