Girls can't eat gluten

Matt always makes sure that the pretend food he gives me is gluten-free, since he knows I can't have things with gluten. But today it became apparent that he thinks I can't have gluten since I'm a girl. (Makes sense since all the guys in this family can.) We were feeding pretend ducks some pretend bread, and he said, "That bread doesn't have gluten in it...because some of those ducks are girls!"