You don't feel much different in your head, though, do you? It's only when you look in the mirror that the full horror hits you...
Shoot, the horror's been hitting me when I look in the mirror all my life! ;)
Me, I just turned 35 last month. And, yeah, my
body knows it's not 13 anymore, but my
head is pretty oblivious to this. :) I used to think there was some point at which people started to feel like "proper adults", or some event that made them feel that way, but increasingly my research suggests that everyone who
seems like a "proper adult" is really just faking it. :)