Sitcoms use laugh tracks all the time. But where do they come from? Do they really make us laugh along? Learn about the origins and psychology of laugh tracks in this classic episode of BrainStuff.Learn more about advertising on the HowStuffWorks podcasts at www.howstuffworks.com/advertisers.htmAnd to learn about your ad choices when listening to podcasts, visit https://www.howstuffworks.com/privacy.htm#ad-choices
