For part two (heh) of this series I’d like to take a look at creatures with bifurcated or twin units. As it turns out, this adaptation works in many orders. Snakes, lizards, crustaceans, and insects can all have double dongs, although in this post I’ll concentrate on vertebrates because they’re more interesting and not as gross.
Animals with doppelgänger danglers include:
Sharks: These demons of the deep have paired “claspers”, or grooved semi-peen that lie between their pelvic fins. Although they only use one at a time, the appendages often have barbs or other adaptations to keep them inside until insemination is complete.
Flatworms: In addition to being hermaphroditic. these colorful little guys also use their pair-o-peen for fencing. Going at it Sulu-style isn’t just for sport. Turns out the winner is the one who gets to top. The loser ends up being no-foot and pregnant at the bottom of the sea.
Marsupials: Many species of this infraclass, which includes the koala, the wombat, and the possum, have a bifurcated penis. Females often have three vaginas. They use two for mating and one for giving birth. But despite rumors to the contrary, the kangaroo has just one penis. It sure is weird-looking though. Weird enough that I’m not including a link.
Similiarly the echinda, or spiny anteater, has a four-headed penis. During careful echinda sex, the male uses two heads at a time to ejaculate into the female’s two laterally placed vaginas.
Us: With fabulous words like “diphallus” and “supernumerary”, the anonymous the webmistress at this site describes some unerotic but nonetheless interesting medical oddities.
Featured image: Sesame Workshop