My parents used to spank me. But I learned from the first couple times. I think I'd probably follow in my parents methods because that's what they did.
But this spanking method only works on certain people. I think obviously there's an age limit to this, and sometimes people try to spank someone who is out of the age bracket where this would be effective and it makes the child act more disobedient.
Oh and @mdport.; I totally got the soap too! Only when we swore or talked smack about our siblings. Lol