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

Superhero Memes - It's a conspiracy I tell you!! Actually it's a joke but I know someone will take it seriously #trunksgate #insideoroutside #underoos —Dr Fate

Has Batman ever realized how weird it was that he wore underwear on top of pants? - Quora

Batman's Underwear Saves His Life When Falling From SPACE!? #shorts

Batman without pants, wearing white underwear, looking

Return of Underwear-Outside-Trousers Explained in Batman #53 [SPOILERS]

The Dark Knight Rises Changed This Character's “Sickening” Death to Avoid an NC-17 - IGN

Batman's Underwear Saves His Life When Falling From SPACE!? #shorts

In all seriousness, in universe how do you think Batman justifies the whole underwear on the outside of the costume look? : r/BatmanArkham