Time for bed

Before bed, Brooks always asks for some milk. I don't like him to have milk before bed because for 1 I don't want him to wet the bed and 2 it's not good on his teeth to fall asleep with milk in his mouth! So I told him "No hunny,your teeth will fall out if you drink Milk before bed but I will get you a small glass of water." He looked at me somewhat concerned and asked "Does water make your teeth stay in?"