Doug Wilson has some good thoughts about spanking:
People who do not know how to look beyond surface appearances will say that when you spank a child you are teaching them violence. They say spanking a child is hitting a child, and they are impatient with those who seek to make fundamental distinctions. Lovemaking is not rape, even though the same biological act is involved in both. Executing Ted Bundy is not imitating Ted Bundy, even though someone loses his life in both instances. The difference between child abuse and child discipline is as vast as the difference between unrighteousness and rightousness.
Read the whole article here.