Matt Damon's an Academy Award-winning actor, but he's not above using potty humor—for a good cause!
In a newly released PSA for World Water Day, the 42-year-old actor-activist lends his voice to a funny yet very informative campaign.
"Quick, what invention saved the most lives in human history?" an animated stick figure, voiced by Damon, asks. "The answer is the can, the john, the porcelain throne, the bog, the foreign office, the Thomas crapper. That's right, the toilet!"