Words like 'poop' and 'wiggle' are inherently humorous, and science may have figured out why. Learn what research has to say about why some words tickle us in this 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
