This is Howard Moskowitz, the person responsible for making some of the snacks you consume irresistible. You know how sometimes you open a bag of chips and you can't stop eating? That's due to the "bliss point" that Moskowitz helped find in food ingredient combinations.
His work is talked about a lot in Michael Moss' book Salt Sugar Fat and there has been widespread controversy over whether his work has made food addicting. I highly recommend watching the video above and if you're intrigued at all, go and pick up Salt Sugar Fat. It might just change the way you look at food. And if not, it's just a good read anyway.