Dull red light illuminates the blacksmith’s face as he pulls a glowing iron rod from the forge. Scaly impurities scatter as the smith hammers the rod into a horseshoe shape. He sets it down and the red glow fades. Now a customer walks into the shop. Before the smith can warn him, the customer picks up the horseshoe and, screaming in pain, drops it. Chuckling, the blacksmith says, “Hot, isn’t it?” The customer replies, “Nope, just doesn’t take me long to look at a horseshoe.” My grandfather told me that joke. Around a thousand times.