Do you think Batman has outgrown the underwear over tights, or do

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

Batman without pants, wearing white underwear, looking

American Values BATFAN on BATMAN

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

How has the Batman costume evolved over the years? - Quora

What if Batman's underwear is inside, not outside?, by SickSix

Why does Batman wear his underwear on the outside? - Quora

How has the Batman costume evolved over the years? - Quora

Best Costume Designs for Superman and Batman, change my mind. : r/comicbooks