Sirens are mythical creatures, of course, who prey on people of the opposite sex. In the old stories, sirens were generally women who lived on rocky islands and "sang" to sailors who sailed by. The sailors, who could not resist the siren's song, ran themselves to their deaths on the rocks that surrounded the shore, to caught up in the compulsion that the sirens used. No one can resist the call of a siren, with a few exceptions. In the Odessy, they plugged their ears. It is the most potent form of mind control. Nowadays, sirens stick to the mainland, the invention of airplanes limiting the number of sailors they have to prey upon. It is my understanding, though, that, much like selkies, sirens don't stray to far from the coast. It is possible even today, most sirens are female, though males are more common than in the old days.