MATH PUZZLE: Can you replace...

A psychiatrist was conducting a group therapy session with four young mothers and their small children. "You all have obsessions," he observed.
To the first mother, he said, "You are obsessed with eating. You've even named your daughter Candy."
He turned to the second Mom. "Your obsession is money. Again, it manifests itself in your child's name, Penny,"
He turned to the third Mom. "Your obsession is alcohol. Again, it manifests itself in your child's name, Brandy."

At this point, the fourth mother got up, took her little boy by the hand and whispered, "Come on, Dick, let's go".