Saw this in the news yesterday and it amused me greatly- sounds just like the cocklodgers we see here in the relationship board so I thought I'd share it:
But this description applies only to the females. The males have evolved to become little more than sexual parasites that fuse themselves to their mates, losing all their internal organs – including their eyes – in the process. Connected for ever, the male retains only his testes to provide sperm in exchange for food.