the love mustache.
when you are sexing your lady (or dude) and you pull out and ejaculate on her (his) belly, you then dip your finger in the pile of protein you left on the belly and rub it over her (his) lip in the style of a spanish gent.
i was sexing my old lady when she says she wants to look like caesar romero (the joker in the batman show). i pull out and pump my joy juice on her belly. then i craft her a fine protein mustache. aye dios mio! what a fine milky sanchez!!