If you need six cardboard sleeves to keep the styrofoam cup from burning your hand, your coffee is too hot. If you wait twenty minutes and still suffer third-degree burns on your tongue from sipping it, your coffee is too hot. When Paris Hilton won't describe it as "hott" because her mouth is on fire, your coffee is too hot. If you prepare your coffee with magma, your coffee is too hot.
Think about that, Dunkin Donuts.