When a mustached man (or women) goes down on a girl and their lush mustache tickles the girlsvagina ever so slightly. The girl should make a purring noise.
Mustached Man: OMG! tickle tickle tickle young one Young One: purrrrr
Mustached Man: I love your firm boobies HAHAHAHA silly women
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi