By A Mystery Man Writer
Why are people bothered by Superman's underwear over his pants, but not over Batman dressing up like a bat, or having horns instead of ears? - Quora
Has Batman ever realized how weird it was that he wore underwear on top of pants? - Quora
Why Do Superheroes Wear Their Underwear on The Outside? (Article) : r/batman
Why does Batman wear his underwear on the outside? - Quora
Return of Underwear-Outside-Trousers Explained in Batman #53 [SPOILERS]
Why does Batman wear his underwear on the outside? - Quora
What if Batman's underwear is inside, not outside?, by SickSix
Why are people bothered by Superman's underwear over his pants, but not over Batman dressing up like a bat, or having horns instead of ears? - Quora
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Discussion] While Batman does usually have armor padding underneath his suits, do you prefer the “cloth like” exterior or the armor exterior? : r/DCcomics