I_knew this girl who would paint curvy mustaches on her and walk around all day with that thing on her face. I have to admit she looked kindda hot.
Frida Kahlo is the ultimate mustache girl, I think.
I had a girlfriend once with a little mustache shadow. I can't remember how I managed to ask her to wax it off without offending her, but I did it. It was one of my great moments in diplomacy.