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

Battle of the Bulge: Why We're So Fascinated by Superhero Codpieces, by Tim Grierson, MEL Magazine

Look Back: Batman Drops the Underwear On The Outside Of His Costume

The Importance of Batman and Superman's Underwear - IGN

Boys Multi 6pk Batman Briefs

Look Back: Batman Drops the Underwear On The Outside Of His Costume

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

Why Do Superheroes Wear Their Underwear on the Outside?

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

Batman Boys Performance Boxer Brief Underwear, 4-Pack, Sizes 4-10

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