Can you describe a time when you were confused about your teenage daughter's social life?

I’d appreciate it if you could describe the events so that I can see what was happening (as far as you knew), and then also tell me what you were wondering about what was going on at the time, and what you might have found out later about what was going on.

If you don’t have daughters, but have a story to tell about a son, that would be fine, too. I have a son who will be in this position in a few years, too.