 We are drawn to foods that are fatty and sweet and rich and complex. Now, cheese is fatty, meat toppings are rich, and the sauce is sweet. Yep, and pizza toppings are also packed with a compound called glutamate, which can be found in tomatoes, cheese, pepperoni, and sausage. Now, when glutamate hits our tongues, it tells our brains to get excited and to crave more of it. This compound actually causes our mouths to water in anticipation,