You pass people while Traveling at the Speed of Bike. And then they ask you to take a photo, and you meet, and you chat, and you leave each other better because of it.
(If interested, see my book, Traveling at the Speed of Bike, on Amazon in all global markets. You may also enjoy my Today’s Nice Stranger photo album. There are thousands more people whose photos I didn’t get but who changed my life in big and small ways.)