The event was Nude Bike Riding Day but he was trying to convince them it was Nude Dick Riding Day....!
Or....maybe it was cold outside and he wanted to keep the little guy warm by wearing....
Follow these links to see others having a good laugh...!
https://pimpandhost.com/p/why-are-they-laughing-40646
https://pimpandhost.com/p/why-is-she-laughing-40450
https://pimpandhost.com/p/why-is-she-laughing-40316
https://pimpandhost.com/p/why-is-she-laughing-40255