It's just a peacoat... lol. No age limit required. i have one also. They're a decent style. I believe Bud is a couple years older than me, 25/26? Pretty sure people grow out of the whole 'vampire' scene when they're around 16-18 or so. At least everyone I know that used to be a 'goth' has grown out of it.
This is mine...
That's my current coat for when it's really cold, but I need a heavy duty waterproof for when the weather turns, as that will soak straight through if I'm out for more than 5 minutes when it's pissing down.