When a female fossa is born she has a small clitoris and vulva, as might be expected. Then, at around seven months of age, something odd starts to happen. The fossa’s clitoris enlarges, grows an internal bone and acquires spines to become a facsimile of the male’s penis. It even exudes yellow liquid on its underside, like an adult male’s. The female fossa sports her penile clitoris for a year or two, until she becomes reproductively active, when it magically disappears.
