In desolate caves throughout Brazil live insects that copulate for days, the female's penetrating erectile organ sticking fast in a reluctant male's genital chamber until he offers a gift of ...

Add Yahoo as a preferred source to see more of our stories on Google. The female penis of the Neotrogla aurora insect species is seen in an undated handout photo released April 17, 2014.

Scientists discovered the first insects with sex-reversed genitalia in Brazilian caves. Yes, by sex reversed we mean that the female insects have penis-like genitalia and the males have vagina-like ...

Neotrogla, a type of insect found in caves in Brazil, has a bizarre mating ritual. The act of reproduction lasts for days, and during the ritual, the female grows a penis-like structure called the ...

Girls will be boys and boys will be girls, but a little-known Brazilian insect takes role reversal to a whole new level. The cave-dwelling Neotrogla female sports an impressive ‘penis’, which she uses ...

THREE little words – not tonight, dear – tends to be enough to cool the ardour of even the most red-blooded chap. Now a colony of previously frisky female stick insects has been found to have not only ...