Fungus ear: here certainly does not mean to eat the fungus, in fact, refers to the girl's genitals, where the black

Black fungus: literally means that there is black, but also refers to have had a sexual experience, or misbehavior of girls, but also refers to the other boys played with the girl.

Pink fungus: literally pink, also refers to the virgin, or no sexual experience, more pure.

In addition there are silver fungus, referring to the excess of both.