Speaking of formative years, kids aren't required to change in front of each other for PE starting in middle school, like they used to be. I think that's part of it. They never face that embarrassment and get past it. Plus they don't gather in crowds of strangers, they stick to their friend groups, too often online only, so there's not the opportunity or the gentle pressure to take a shot and ask someone out. Also, from what I've read, people are bailing on plans they do make at the last minute.

Add to that the stigma against sexualizing others--if you're not allowed to look at another person with the idea and intent of getting them to have sex with you, and you can't talk sexually about other people to your friends, the plane never even leaves the hanger. I know this one would rile feathers, but there needs to be some leeway here.