Animal Sex Prof.'s question (8)

If a barnacle's penis isn't long enough, it can do something known as "spermcasting", in which it sends sperm out to sea for another barnacle to pick up.

They leave the tip of their penis in the female as a plug that stops the sperm falling out.

There's a tiny Australian mammal that has so much sex in a period of a few weeks that it basically disintegrates.

A male damselfly's tiny penis contains an even tinier spoon to scoop out leftover sperm from other males in the female's vagina.

Most male squid don't have penises long enough to be useful. Instead, they propel sperm-containing capsules at females with one of their eight arms.

When a sperm capsule attaches to a female squid, she releases a hormone that dissolves her skin, allowing the sperm to get into her bloodstream.