Adrian Monk: Was it him? Call him back.
Natalie: It's a private number! Why didn't you answer it?
Adrian Monk: I couldn't. I don't know how.
Natalie: Mr. Monk, that was important to me. How could you not know about cell phones? Everybody has a cell phone! How do you function in the world?
Adrian Monk: I don't. Did you wash your hands?