The age old question. How would they have circumcised Superman? The tools would break, they'd have to use parts of his ship. How would they vaccinate him? The needles would break. So either:-He was circumcised on Krypton-They made Kryptonite tools to do it on Earth-Kryptons have natural agenesis of the foreskin-Superman is uncut AND unvaxxedIs all of Superman just a Jewish fantasy to create something that could not be cut once, or again? Rather than a more mundane tikkun olam impulse / complex.
He circumcised himself with heat vision and a mirror