I've got one better. My 85 year old Grandmother went into the bathroom to do her morning clean up, and instead of using toothpaste to brush her teeth she used prep H. She didn't tell anyone, but we noticed that her teeth kept falling out, so finally my Mom said "Mom what's wrong with your teeth?" It took us a while to get it out of her, but when we did we couldn't stop laughing about it, we still joke about it to this day.