In the bathroom

Robert, a lawyer, Harold, an economist, and Allen, a teacher, were going to the bathroom. The lawyer gets done, washes his hands, and then proceeds to use almost the entire roll of paper towels to dry his hands. Robert says: I was taught to be thorough. The economist gets done, washes his hands, but uses only
one paper towel. Harold says: I was taught to be environmentally friendly. The teacher gets done and leaves without washing his hands. Allen says: I was taught not to piss on my hands.