Fishing

Do you know how sharks are caught? They use a J hook, I think. They put buoys on the line steadily increasing the drag. They let you swim away thinking you'll be able to escape. Just when you thought you are free, they pull you in, you struggle a bit, and they let you go again. It goes on for a while until you're too tired to put up a fight. That's when they reel you in.

That's how hearts get caught. And you rarely get out unscathed.