You're not my boyfriend!

After directory assistance gave me my boyfriend's new telephone number, I dialed him and got a woman.

"Is Robert there?" I asked.

"He's in the shower," she responded.

"Please tell him his girlfriend called," I said and hung up.

When he didn't return the call, I dialed again. This time a man answered.

"This is Robert," he said.

"You're not my boyfriend!" I exclaimed.

"I know," he replied. "That's what I've been trying to tell my wife for the past half-hour."