April Fools' pranks come and go, but one joke item that’s stood the test of time is the whoopee cushion. Today, we trace its history from ancient Rome to now. Where did it come from? Why is it funny? Will it stay popular? And if everyone knows its name, why does no one company get the credit for it?Sign up for our newsletter: http://newsletter.businessinsider.com/join/brought-to-you-by