The comics, which were sold "under the counter," depicted a wide variety of torture acts, such as horse whipping, paddle spanking and hanging folk upside down. But that's not the most disturbing part here: that would be the fact that a lot of these drawings seem to depict intimate scenes from the marriage of a certain Mr. and Mrs. Clark Kent.
Superman likes it when the landlady watches.
Wait, this guy invented Superman and Rule 34? A true visionary. OK, so maybe the resemblance wasn't fully intentional. After all, there were only so many ways Shuster could draw muscular men and attractive girls. .. but that doesn't explain what Lex Luthor is doing here:
Touching himself, probably.