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True or false: there's some weird dongs on this planet of ours.

How Well Do You Know Animal Genitalia?

They can even detach them and throw them at potential mates.

One of an octopus's tentacles is often a penis.

The tent cobweb spider has two such legs, in fact, and will often rip one of them off in order to run faster.

Some species of spiders have legs that double as penises, and are even removable.

During their mating season, a polar bear's testicles can swell to the size of their own head.

The Argentine lake duck is particularly well-endowed. In some species, the ducks' penises and vaginas corkscrew in opposite directions.

Some species of ducks have corkscrew-shaped penises that can be longer than the rest of their body.

After mating, a female hedgehog secretes a burning substance to prevent any other males from mating with her.

The patterns on a peacock's tail feathers are as unique as human fingerprints, and advertise details about their penis to potential mates.

If several barnacles in one area have ended up as "male," neighboring barnacles will choose to be "female" in order to mate with them.

Barnacles can produce both eggs and sperm in the same individual, and often switch between the two depending on the sexual characteristics of their neighbors.

Yup. Most marsupials have bizarre penises. (An echidna's has four heads!)

Kangaroos have two penises.

Two penises, but THREE vaginas! And only two uteri. Australia, man.

Kangaroos have two vaginas.

They're usually held inside the body until it's time to use them, which is why we don't see them much, but they're there.

Most snakes have two penises, which are covered in spikes or hooks.

You've never seen another species' junk in your life, have you?

Animal genitalia amateur

You know a thing or two about what goes down in the animal kingdom after dark.

Animal genitalia novice

Are you a zoologist? You know your stuff!

Animal genitalia expert

You do know bestiality is still illegal in most places, right?

Animal genitalia connoisseur

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How Well Do You Know Animal Genitalia?

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