I’ve never heard a great explanation as to why the Mods of the ’60s covered their scooters in lights and mirrors. Yet they’re so essential to the style that it’s easy to just take them as a given. Wikipedia offers this explanation:
After a law was passed requiring at least one mirror be attached to every motorcycle, mods were known to add four, ten, or as many as 30 mirrors to their scooters.
Whatever the reason, the tradition of covering classic (or new classic) scooters in mirrors and accessories endures today. I don’t think there’s anything in scooting culture that outsiders find more perplexing. “What the…?”