I threw those hairs away, and there's no visible thinning in my crown area. There's nothing I can take a pic of.
No need to be rude.
EDIT: Besides, I'm asking a general question.
I'm 19 y.o. My temples are receded, but I don't think they've changed since I started taking photos (about a year ago). Hopefully I'll be able to keep my current state till at least 30.
I don't think my crown is thinning, but I tried to pull a few hairs from that area. I noticed that some were...