I'm not denying that this takes place. Certainly it did to you, but it's also not exactly common - and in fact, the reverse is actually A LOT more likely. Aside from the fact that most girls have experienced sexual harassment in childhood, many have also experienced groping, bra-snapping, comments about their bodies, and other types of violence from boys - and not just sexual violence. About 15% of sexual assaults happen to girls 12-17. Young women in their 20s are the most raped and assaulted, the most often traumatized by men. Lots of women I know were assaulted or raped by their brothers, fathers, or male babysitters to say nothing of dates and strangers.

I think that your personal experiences are coloring your perception because the vast majority of boys have never been traumatized by girls in any way shape or form. A few have, to be sure, but I don't see this as a major factor in not wanting to approach women. It seems like young people all lack social skills, and that this goes double for boys. Porn has reinforced for them that women should be available to them just for showing up with a pizza or buying them a drink. Everything has become transactional, and it's harming relationships. Thinking a woman owes you her time because you bought her a drink is an antiquated belief. Why not talk to someone and find out if you connect and THEN buy her a drink rather than imagining you can create a transaction where she owes you something?

And none of this has anything whatsoever to do with testosterone. It's social conditioning in a patriarchal culture, but the times are changing. Women want that and are driving it - too many men are dragging their feet and refusing to change with the times. They feel entitled to women, and when that doesn't manifest in reality, it's never their fault - their lack of confidence, their lack of social skills, their poor grooming - it's always blamed on women based on false narratives that allow guys to scapegoat women. This needs to change.

I do completely agree that all younger people need to spend more time offline, learning to interact with others in person.