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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.
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