Mark went for a walk in the park

As he strolled up the path he heard someone shout, “Mark!”

He stopped and turned his head, and heard it again. “Mark!”

There was nobody around except for an old man on a bench with his dog, so he walked closer.

“Mark! Mark!” said the dog, tugging on its leash in the man’s hands.

Mark was taken aback. “You.. you know my name?! ..and can talk?”

“Oh?” the man lifted his head. “I’m sorry, she can’t pronounce her B’s”.