Don't do it.
Facial hair is fine, but the mustache is not. Please don't stop there, grow the whole goatee. As I get older, my tastes change about some things, but I'm sure that I do NOT know one single woman that wants her man's upper lip to have fur on it without the chin having it, too. If I'm wrong, please feel free to correct me.
Now - If you look like either of these two men, and you have a mustache, it may work for you...
But . . . if you look like. . . . .
Now - I do like the full version - very much. . .
I always love feedback, so if you disagree for any reason, please tell me all about it.
Love ya all.