 I just don't think a Genghis Khan party is in good taste. Oh, hi there. It's me, Pete Leeson. As you probably noticed, the world's a pretty weird place. Okay, an incredibly weird place. Did you know that pre-owned wives were sold at auction in 19th century England? That today, in Liberia, accused criminals sometimes drink poison to determine their fate. How about the fact that for 250 years, Italy criminally prosecuted cockroaches and crickets? I know, it sounds batshit crazy. But what if mankind's most outlandish rituals were in fact ingenious solutions to pressing problems developed by clever people and tailor-made for their time and place? What if, hiding in humanity's seeming senselessness, there was actually a great deal of sense? It turns out there is, and I've got just the tool to help you find it. Not that one. This one. Think in terms of incentives. You know, costs and benefits. Take my friend here. Just earlier today, he was telling me he wants to be a boxer. I pointed out to him that there's a small problem with that. You've got no arms, man. The constraints we face limit our choices. You could be a marathon runner, though. That, he says, would require him to give up his cigars. For him, a major cost. What if I got you that pony you keep going on about? Now he says he wants to know where he can sign up to run. When benefits rise relative to costs and vice versa, we make different choices. You just have to make good on your promise to give up those cigars now, you hear? If, like detectives, you can sniff out the incentives inherent in every social practice, my dear Watson's, you'll have seen the sense of it. And the instruction manual for learning how to do so is right here. It's easy once you get the hang of it, not to mention ridiculously fun. Come join WTF's cast of colorful characters on a tour through a museum containing the world's weirdest practices, guided by yours truly. Let me show you how to use the logic of incentives to reveal the hidden sense behind seemingly senseless behavior, including your own. Can you handle getting schooled by the strange? Or hurry, the tour's about to start.