I assume he has super-bottoming powers. Or at least Silver Age superman had super-bottoming powers. idk about modern superman. Does super-man still have super-knitting powers?
Serious answer; There are two sphincters in your anus. One you have voluntary control over and can flex or release at will. The other is automatic and afaik relaxes when there's something pushing on it as long as you're not really stressed out. I don't read that much superman but I think he usually doesn't just accidentally break things or unwittingly exert his super strength, plus Supes isn't silly edgelord stuff like The Boys, so it's probably fine.
Isn't there a special pink cryptonite that makes superman gay? Clearly this is something that DC already has handled in canon, so I think you can just look it up.
I assume he'd have to be some kind of flexible down there because what if he needed to poop a really big poop?
Could superman digest a poop that even he couldn't poop?
Honestly wondering if his super metabolism just burns through everything and he doesn't poop.
Well then he HAS to atleast try to bottom, being that blessed
I think Superman canonically doesn't require any kind of sustenance other than sunlight
Superman's bi son has all the same powers and has a boyfriend, but it has not been clearly established who bottoms.
He has ventriloquist levels of vocal control, so the other end should be rather trivial.
He's capable of bottoming, but he has to pretend to feel anything when he does. He's a tragic figure in that way 😥
Lube infused with a very small amount of kryptonite perhaps?
Does Supes eat? Does he need to eat? He gets power from the Sun, so maybe not?
Supes and Lois when he performs photosynthesis
ShowSome versions of him definitely do not need to eat, drink, or even breathe.
Only if Wonder Woman breaks out her magic strap-on