The Hot Horseshoe

A blacksmith is in his shop, hammering a hot horseshoe. After the cherry glow fades from the horseshoe, he sets it on the anvil to cool. Just then, a customer walls in, and, while waiting for the blacksmith to greet him, he picks up the freshly worked horseshoe. The customer immediately throws the horseshoe down with a yelp. Amused, the blacksmith grins and asks the customer "Hot, isn't it?"
The customer replies "Naw, it just doesn't take me very long to look at a horseshoe."