I'm amazed that so many women think that this is fine. I bet if there was a naked man in Tesco, or at the bus stop, or in the woods, that he would be arrested, so why do we think that a 100 men cycling naked is fine and dandy?
Most normal people wouldn't want to do this, so yes, I do think that those participating are getting some kind of thrill out of it. Anyone thinking otherwise is naive. They could easily have worn neon lycra, with their cause blazoned all over it, which would highlight the point they are trying to make. But no, here, have a look at my cock instead. 🙄