I'm 20, but every so often I still get carded when I try to see a rated R movie! :x ::sigh:: What makes it worse is my boyfriend, who is a mere month older than me, but everyone thinks he looks 35! O_o
Once at a Renfaire when we were both 16, some old drunk guy thought he was 50! (What made it worse was that we were already together at this point, and so the old guy thought my poor boyfriend was a pedifile ^^; Even though most people don't think he's *that* old, he still gets looks every so often... "Is that your baby sister?" "Um, no. She's my girlfriend" O_O)
As for mental age, I range from 3 to 100. Depending on the time of day. The earlier, the older.
M'dear boyfriend...5. End of story. ::gets hit on head with rolled up poster::