In a mental institution a nurse walks into a room and sees a patient acting like he’s driving a car.

The nurse asks him, “Charlie, what are you doing?”

Charlie replied, “Driving to Dublin!”

The nurse wishes him a good trip and leaves the room.

The next day the nurse enters Charlies room just as he stops driving his imaginary car and asks, “Well Charlie, how are you doing?”

Charlies says, “I just arrived in Dublin.”

“Great,” replied the nurse. The nurse leaves Charlie’s room and goes across the hall into Bob’s room, and finds Bob sitting on his bed furiously masturbating.

Shocked, she asks, “Bob, what are you doing?”

Bob says, “I’m screwing Charlie’s wife while he’s in Dublin!”