In the latest video from Prager University, Comedian Yakov Smirnoff explains how laughter is a key to happy relationships and can even serve as a gauge for a couple’s success.

He’s pretty funny in the process, too.

Here’s more information.

How do you know if your relationship is going in the right direction? Is there a way to tell if you’re in love? Well, yes, and studies confirm that the measuring stick is how much laughter there is in your relationship. Comedian Yakov Smirnoff, host of PBS comedy special “Happily Ever Laughter”, explains.