If they ever use Kryptonite again, I want Superman to man up and don't be a pussy. In every film he turns into a wimp just because he is weakened to human levels. Especially laughable in Superman II, when he gets bullied, and after he gets his powers back, he becomes the bully. That's a pretty ugly character. Run Lois, run.
Kryptonite can kill him not just weaken him.