Fear of Letters

Okay, so basically, the dude is scared of random letters, right? The therapist asks if he is, and the dude screams. Why? Because the therapist said, "You are?" Get it? 'U R' sounds like 'you are'! You probably didn't get it because your brain is as smooth as a bowling ball, but hey, that's why I'm here, to drop some knowledge bombs on your clueless self!