The question that used to keep up at night when the only companion I had for a boring fortnight was some supergirl tpb, was do Kryptionians possess the gene that creates the fatty acid that gets eaten by microbes that in turn generate body odor?
I'm mean, they're super, right, so earths microbes probably wouldn't be able to consume their sweat.
Supergirl probably smelled of ozone. I have nothing to back this up since no writer has tumbled down that particular rabbithole of a fetish. But it seems right.