So just to be clear--you're not persuaded by the Niven hypothesis, right? :P

An easier fanwank of Lara's speech is that as long as he had his powers, he would be unable to have children with Lois (like maybe they affected his DNA or something?) and since Lara probably has a vested interest in the passing on of Kryptonian genes, she wants him to reproduce.

I thought it was pretty interesting, btw, that they suggested that this particular interspecies mating had had problems, like Jason's asthma.