The. Study. Of. Laughter. It exists, and it's called gelotology. In one of the oddly more somber episodes, Alie sits down with Dr. Lee Berk, a doctor who is "serious about laughter" and has dedicated decades to hunting down how humor affects the body. Learn about what makes a joke a joke, the science behind happiness, why you laugh when you're nervous, if comedians are naturally depressed or if that's a myth, and why some people get paid to tickle rats. Gelotology is an actual science and as Alie learns, it really is no laughing matter.