Moreover, do all superheroes wear masks?
Masks. They are as common in the world of comic books as allergies on a spring day. They protect the identity of the heroes who wear them, strike fear into villains who oppose them, all-the-while looking, for the most part, really awesome. Even though some superheroes elect to not wear them, most do.
Secondly, why does Batman wear a mask? Granted, not all of Batman's enemies wear masks. In The Dark Knight Rises, Bruce Wayne explains to Officer Blake that the mask was to “protect the people closest to [him]” and that “the idea was to be a symbol—Batman could be anybody.”
Thereof, do domino masks actually work?
Domino masks—that is, those masks that only cover up that small, around-the-eyes portion of the face—would not really hold up in real life. No, of course those masks wouldn't work. When speaking to your wife or sister or coworker, not even an almost-full-face mask like Batman's would work.
How does Robin's mask stay on?
1 Answer. Most likely he uses Spirit gum. Spirit gum is a common theatrical adhesive used to affix facial prosthetics. Alfred Pennyworth being a classically trained actor would be very familiar with Spirit gum, and would no doubt have suggested it's use in securing Robin's domino mask.