A kid stopped by my neighbor Tom’s house the other day lugging a box of popcorn. Tom wasn’t interested in buying popcorn, thanked the kid, and shut the door. An hour later, Tom went out for a bike ride. Outside, the bike was gone, but there was a box of popcorn in its place. The kid got Tom to buy the popcorn, but it came at a pretty high price. While I don’t condone stealing bikes, I do think there are ways to motivate people to do what you want them to do without hitting them over the head with the fact that they have been motivated.