Spanking

Why is it assault if you spank a adult if they make a mistake or do something you don’t like but it’s discipline if it’s a child 🤔 why can’t I spank my husband if he doesn’t pick up after himself or if he breaks something or talks back? Also if you use any type of item to hit an adult it’s assault with a weapon but again if you do it to a child it’s discipline. 🤔🤔