My son is a beast.
A typical feeding involves him growling as he attacks my breast. His eyes open wide, his mouth follows suit, then "Grrrr," he latches on. When he gets tired, he tends to clamp down and shake his head violently. Barbarian. I don't know where he gets it from.
Actually, I do. Yesterday, I caught Morgan coaching the little guy in a variety of growls and roars.