It was happening in the 80’s.
I'm told it was happening during the 70s, too.
I was too busy drinking in college to have a relationship with a woman that was serious enough for sex.
But I will always have the summer of 79 to reminisce.
The point to the entire discussion is not whether it was happening in this or that era - it was happening in the 12th century, for whatever that’s worth - but whether it is continuing to grow, and whether it is normalizing in the ethic of the culture. The discussion is not about the occurrence, but about the frequency.
Also, men tend to make jokes about this, because there are moments when we all wanted to meet this type of woman. (I was 16 once, too.) Fine, have a chuckle here in the locker room. Then, when you marry and have children, you grow up, and you realize what a tragedy sexual promiscuity is for both genders. And you may still make a joke among other men, but as you chuckle you are mentally blanking the face of the woman who is at the center of the story of the day, and you are certainly not thinking of your daughter or your once-future wife.