During the peak of summer off the coast of Maine, a female lobster approaches the den of a potential mate. Male lobsters are aggressive, so she’s whipped up a love potion to win him over. The persuasive concoction is her own pee, full of seductive and disarming pheromones, which springs from a surprising source. “I hate to tell this to people who love to eat lobster,” says Ellen Prager, marine scientist and author of Sex, Drugs, and Sea Slime: The Oceans’ Oddest Creatures and Why They Matter. “Everybody thinks [their bladder] must be under their abdomen, but no, it’s actually between their eyes.”