How does Superman cut his hair? How does he cut his toenails?
He’s invulnerable, right? Can’t cut him with a knife or shoot him with a bullet. His clothes are invulnerable, too–I think the international garment industry has suppressed the details.
It’s just another one of those goofy things that nobody has thought through.Take vampires. They’re un-dead, right? Not alive. So if you became a vampire as a toddler, wouldn’t you be a toddler forever? Now there’s a thought…