Is 12 too young to have a mustache?

umm...not realy, it depends what you look like, if you look 12 then yea it will look kinda weird but if you are a 12 year old that looks much older then you could probably get away with it as long as it wasent one of those thick mario ones and was just nicely shaped, to be honest at the end of the day if youre able to grow it why not? it's your body do what you want mate