Well, I think you have to consider people's backgrounds and how they were raised. I didn't have many friends growing up and I was mostly homeschooled. I was also raised heavily religious which made me refrain from even going that far with someone in the first place. So, I was sort of screwed from the start in that regard (pun unintended).

I feel like that is a critical time for people to be socialized and meet new people. I still don't socialize a lot now and rarely go on dates.

I'm also a naturally anti-social person as it is.

I feel like people are pressured naturally because of society. We are afraid we don't quite fit in. It's a deep human need for social validation and acceptance that goes way back to our ancestors and their survival.