Octopus sex is just strange to begin with, all those tentacles and hormones swirling around - shit's naturally gonna get dramatic. The male octopus has a tentacle that is his designated "gettin' busy" arm and he places a nicely wrapped package of sperm on that sex arm and sticks it in a slot on the female's body for reproduction. But that's just the beginning. The sex tentacle BREAKS OFF within the female's body and that's it, no more dick for that octopus. He will never regrow his dick-arm and he will eventually die.