It's not that bizarre, there are certainly more bizarre mating rituals in the animal kingdom... Some male sharks bite female sharks while mating, and what about the praying mantis? She bites off his head, and he can still finish mating with her headless (I just read that she rarely does this in the wild, just in the laboratory when confined with the male, maybe in the wild the male just runs as fast as he can...). It makes biting off a tentacle seem tame... The media always has to put their own spin on the news...