New limited series: The Rocket landed in Alabama.

In 1969, science fiction writer Larry Niven wrote an article about how Superman could never have sex with a human woman, because he would destroy her.

So maybe Supergirl is the only option he has.

Aren't there several stories where he does fall for her?

Alex from streetfighter would advocate for this. He did marry his sister after all.

I mean, we don't know kryptonian genetics. Might be both safe and normal there