There was this Clone on Smallville who in his gooey centre was Lex and Clark DNA all stirred up. They thought it was just another Lex Clone until bullets started bouncing of his chest.
This is actually "genetically" what their child would look like, even if his outward appearance is identical to a Young Lex Luthor.
One of the first things Geoff Johns (Now a Smallville writer) did on the Teen Titans was to have Superboy(Superman's teen Clone) discover that when they cooked him up in the lab that there was just so much that they didn't understand about Kryptonian dna that they had to use a bit of human to help smoothe the edges. Any human would have done. Any human at all.
Lex was screwing Supergirl in the 90s when he had all that hair pretending he was his own Austalian son (They scooped out his brain and eyes, then put it into an idealized clone of Lex Luthor who had been dying of kryptonite radiation pioisoning because of that signet ring he wouldn't take off.)
Of course back then Supergirl was just a pile of snot from a mirror universe who thought that she was Lana Lang, so it's not like she had any kryptonian reproductive system for Luthors jizz to smash into hoping for a child who could kick Superman's ass for him down the line.
PS
How can one not know that "rooting" is Australian for sexual congress? Have you been rooting? I rooted her. I had a good root. And so on.
We are supposed to be an international community appreciating the wonders of all our global swears.
