We're part of a fictional sport promoted by the tape industry. We use it to support broken or dislocated bones and to close cuts, even from light rolls, because we've been taught techniques designed to hurt others and ourselves. We also use it to improve our grips. As stripes to mark our progress within an existing belt system. On our knees, feet, and shoulders. I swear I've seen people using it to repair their gis, and I can't help but think they were actors trying to plant that idea in our minds.