There were a number of spanking panels in the various incarnations of Archie comics from the 1960s and 70s. I heard that Archie comics were written and drawn by a number of different people over the years. Assuming that is true - and it makes sense that it is - most of them must have had some interest in spanking, since there were different variations: Mr. Weathbee spanking Betty and Veronica, Archie kicking Reggie in the butt (not really m/m, as it was something to do with some sort of hypnosis that Reggie was under), and Betty and Veronica spanking Archie (I remember the plot of this story, and how it ended, but I don't recall if it was the original Archie or a Little Archie comic. Though that didn't stop me from basing a story on it. Since I don't like to resort to shameless plugging, I won't mention the title of this story, but you could find it if you want to, by searching the LSF data base under "And The Beat Goes On . . .

).
I wasn't even much into comic books, and when I did read them, I leaned more towards Superman. The Archie comics were my sister's, and the only ones I can really remember are the ones which had spankings in them. Which I guess shows where my mind is at - and where it has always been at.
Also, though it isn't exactly spanking related, there was that Coppertone Girl ad in which a dog is tugging at the bottom half of the bathing suit of the young girl, partially exposing her white cheeks, ostensibly showing the difference between her Coppertone-assisted tanned (not burned!) legs/torso, and her white cheeks. It probably has no effect on people who aren't into spanking, but I always thought of spanking when I saw it (and I was probably just a bit older than the girl in the drawing when I first came across it). I feel a little guilty about this, since the girl in the cartoon was probably about 5.
I recently read that the girl drawn in the ad was based on an actual person, whose mother worked for ad agencies and created a drawing of her daughter, which was used for the Coppertone ad. But the girl, who is about my age now, absolutely HATES anyone referencing that drawing, or asking about her "tan lines." Geez, some people are soooooo sensitive!