This male creature impregnates itself by stabbing his own head with a needle penis.

Oh, the wonders of nature.

This is the Macrostomum Hystrix Flatworm:

Now, poor ol’ wormy worm can’t always find a girlfriend to have sexy times with, so in desperate, lonely times, his species has figured out a way to make babies with himself.

The process basically involves the worm taking his penis, which is sharp like a needle, and stabbing himself in the head until a baby is implanted.

Please allow an actual science person to explain (via Science News):

If raised alone in the lab, a tiny Macrostomum Hystrix Flatworm ends up with sperm distributed oddly around its body, researchers report July 1 in Proceedings of the Royal Society B. More sperm gets injected into the head and upper body and less into their rears than in counterparts with social opportunities, says coauthor Steven Ramm of Bielefeld University in Germany. He knew isolated flat worms self-fertilized somehow. The new work suggests they just curl their rears forward for a convenient jab.

So there you have it. This particular breed of flatworm really represents the epitome of ‘taking one for the team’.

YAY SCIENCE!