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Superman has probably seen his parents have sex
(programming.dev)
A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. A showerthought should offer a unique perspective on an ordinary part of life.
If he has x-ray vision shouldn't he just be seeing a bunch of bones or other dense objects not penetrable by x-rays? Can it be shut off? How? Are we sure he wasn't responsible for a drastic rise in cancer rates by going around just blasting everyone with his radiation vision all day?
While he can turn off his laser vision I am going to go ahead and say he cannot turn off x-ray vision. Superman only identifies people based on skeletal structure.
Have you ever seen Superman compliment someones hair?
Me neither.
Is there a one-shot somewhere about people around superman getting cancer due to his x-ray vision? I think it would be an observable phenomenon if his eyes always worked in this manner.
Like watchmen
In the comics (at least those from my decades ago childhood), it's depicted as him seeing the same as normal people do - just through stuff. As such, I've always assumed it's not actually X-Rays proper & they just used that phrase to convey the concept of seeing through solid objects.