In short, wearing gauze, casts, eyepatches and similar items for Fanservice purposes, or seeing it as such. The basic psychology isn't difficult: the appearance of injury implies the need to be protected, which inspires a desire to approach and comfort the injured person. The fact that wearing only bandages implies exposure , deliberate or accidental , doesn't hurt either. Alternatively, characters wearing Bandages may satisfy the Rule of Cool too, as a stronger, more involved character who wears bandages but doesn't stop taking part in whatever needs to be done is a sign that they're dedicated to the plan in spite of their injuries. A more extreme version of this fetish is abasiophilia, a sexual obsession with disability or the appearance of disability. Amputations, prosthetics, parapalegia, and the like fall under this category.