I'm not kidding. Take a look for yourself. Here is the 1941 original.

What the Man of Steel is doing here, is spanking her sacrum. That's the large bone at the base of the spine which connects to the coccyx. I have no idea why Siegel and Shuster chose to publish this picture as it is, for we all know what a gluteus maximus is... and this ain't it!
There is a lady called Claire Fonda, who is as much an expert on spanking as anybody is. In a Shadow Lane video, we see Claire answering the question: WHERE should a proper spanking land? She cheerfully replies: Right on the jeans pocket. And ya know, I think she's right.
Long story short: I've decided, after all these years, to take that 1941 cartoon and re-draw it to show Superman's hand landing more properly, on Lil Danvers' rump. Here's what I came up with:

I hope you will look at this, and either agree with me that the second rendering is better than the first... or else tell me that I'm an ugly old foof for raising this question so late in the game.
I hope I don't get sued.
Cheers,
Dan