Sorry everyone for the delay in citing source.. I got ahead of myself.
Where on the body?
The Bible says, “the rod is for the back.” That would include anything that is not the front—the back from the shoulders down to the feet. When training, and not chastening or punishing, any convenient place on the body is effective. When you have told a child not to touch, and he reaches out, you can thump or swat his hand. If he is trying to climb down from his chair after being told not to, you can swat his legs. But when you are engaging the child in serious chastisement, the small of the back down to the thighs is the most effective. You can spank half as hard on the back with a light, stingy switch and be more effective than spanking harder on the bottom or thighs.
Doctors: What organs in the small of the back might be particularly vulnerable to being struck?
And, yes, we know that there are people out there who actually listen to this. 5000 members on Facebook alone.
Respected and Wholly Loved Children 