"Mom... why does that lady have a fat stomach?"

Today at church I was chatting with a friend when her son who is about six came up and said, pointing at me, "Mom, why does that lady have a fat stomach?" I smiled as she explained to her son that it was because I have a baby inside. After she was done explaining, I said to him, "Don't worry, it will still be fat after the baby comes out." To which he responded, "I won't." Man, I guess it is obvious that a baby isn't the only excuse for a fat stomach.