I've read my fair share of Bronze Age Superman comics. I'm gonna stand by what I said. It wasn't the Silver Age, but it was still doing really bizarre plots. (One writer explained that this was largely a result of editor Julius Schwartz having gotten extremely jaded by that late point in his career. He was constantly demanding more originality, stuff that hadn't been done before, and to satisfy that the writers had to go to some really strange places.)
Heck, one of my favorite Bronze Age stories is about Luthor coming up with some master scheme to kill Superman that involves faking he's reformed. Only he knows he can't successfully fool Superman about that, so instead he 1) has his computers find the one woman in the world who is his soul mate, knowing that meeting her would get him to genuinely reform, 2) arranges events so that he'll bump into her, 3) erases his own memory of the whole plan so that he won't blab it once reformed, leaving his pre-programmed robots to implement it. It's ridiculous, and it's great.