I wish I had mustache like every other person
Well I don't have! they seem to take a lot of work. You even need special pomade called mustache wax to groom your mustache 
Oh that makes two of us but you seem to know more about it them me so tell me more
Well I don't know much more than that, but some people think that shaving itself has been around for a long time. They've found stone razors from the neolithic period
How long does a mustache grow?
I really don't know, but mustaches can be found everywhere. Even on a 4th Dynasty Egyptian statue of prince Rahotep. 
What causes the growth of mustache?
Moustache
A moustache (; , ) is facial hair grown on the upper lip.
Etymology.
The word "moustache" is French, and is derived from the Italian "moustacio" (fourteenth century), dialectal "mostaccio" (16th century), from Medieval Latin "moustaccium" (eighth century), Medieval Greek μουστάκιον ("moustakion"), attested in the ninth century, which ultimately originates as a diminutive of Hellenistic Greek μύσταξ ("mustax", "mustak-"), meaning "upper
'Speak this way', or 'Can you please raise the pitch of your voice a bit higher' or anything like that." And, "Sometimes, actors expect from me a bit more detail, to give them specific advise but I don't do that. But what I DO sometimes is to tell them different stories, or speak about other things that do not seem to have anything in common with what the actors should be playing, but indirectly might help them feel the same way as the character feels