Danny actually does like being the Butt Monkey of the Defenders...in his pants. Someone (maybe Matt?) notices and casually outs him in another after-fight hangout, humiliating him further. They all run with it, routinely making Danny red-faced and squirming and uselessly clenching his fist. Bonus points for doing it in public (texting him in boardroom meetings, nonchalantly being mean to him in fights) and coming in pants.