“Scientists have discovered several species of insect in a cave in Brazil that display what they say are the world’s first discovered instances of female “penises.”

The four species of insect, which live in dry Brazilian caves and feed on bat guano, display something scientists are calling an “evolutionary novelty”: full-on, anatomical sex-role reversal. Though rare, instances of sex-role reversal have been found in other animals before, but this is the first time the “intromittent organ,”—the male organ—is reversed, Reuters reports.

During mating, the female receives sperm by inserting a penis-like organ, which scientists call a gynosome, into the male, which they can hold in place against the male’s will.”* Cenk Uygur, Jimmy Dore (The Jimmy Dore Show), Gina Grad (Gina Grad Show, Pretty Good Podcast) and Dave Rubin (The Rubin Report) break it down.

*Read more here from Denver Nicks / Time:
http://time.com/68751/female-penis-found-brazilian-cave-insects/