What do Tom Selleck, Frank Zappa, and Mexican Molly have in common? Turns out that all three understand the power of the mustache in attracting mates:

Scientists were unsure why male Mexican mollies wear an extravagant moustache-like structure on their top lip.

Now a study has revealed that female fish find the moustache sexually attractive, and it is likely to be a sexually selected trait.

As well as being visually-attractive, the moustache may be used to rub the female fish's genitals, exciting them.

Link

Previously on Neatorama: 30 Strangest Animal Mating Habits