I have no opinion on that really. Moustaches look good on some, and less good on others.
Do you like it? then wear it. Otherwise, don't.
I've never seen any young person anywhere that looked good with a mustache. Most teenagers have that disgusting peach fuzz look that means that they aren't yet physically matured. The ones that have full hair growth tend to just look creepy with mustaches.
Well, sure... of course, adults not liking a fashion on a teen has always stopped them from doing it. lol
I still stand with "If you like it, keep it and wear it.".