Anyone with half a brain knows no self respecting density will sell this. The number one they teaches kids is that you don't brush food into the gum... So any

Anyone with half a brain knows no self respecting density will sell this. The number one they teaches kids is that you don't brush food into the gum... So any magic brush that works by biting will push the food to where? Hint: it's not away from the gum. Would love if they worked around this problem though...