... It is probably good Power Girl hasn't been on Smallville. I'm not sure anyone could handle that. (Man, if I was writing Smallville, I would have totally found an excuse to bring in Superman's mermaid robot girlfriend AGES ago. SO THAT LEX COULD BONE HER. Or whatever robot mermaids do.)

I think you are underestimating both the powerful allure of Ma Kent and of Lex's EVOL.

And the need to bone the ladies in Clark Kent's life.