Tipping is a subject that sparks arguments every time it is raised. We want to do what's right, but the system itself is truly weird. Basically, you go to a restaurant and pay separately for the food to be brought to you, because the restaurant isn't paying their servers much at all for their labor. So why is the customary tip based on the price of the food? The host of Casually Explained takes a somewhat cockeyed and definitely casual look at the weird American system of tipping.