At 2 a. m, Mrs. Culkin was convinced that she had heard a prowler in the living, room. "Tiptoe down-stairs," she told her husband. "Don' t turn on the lights. Sneak up him before he knows what's happening Dutifully Mr. Culkin put on his robe. Just as he reached the bedroom door, his wife added, "And when you come back, bring me a glass of milk."