So your college ex-boyfriend has gone bald. A mild ego boost for you? Sure. His fault for wearing baseball hats so obsessively? Not quite. As it turns out, it’s a myth that wearing a hat too often can cause baldness (yes, even though your granny swore otherwise when you were little). As long as a hat isn’t too tight—and we’re talking so tight it cuts off circulation to hair follicles—then it’s impossible for hair loss to result. And hat hair—that’s a different story entirely.