Here's what he (and we) have learned from his oddball diet.As the saying goes, pizza is like sex. Even if it’s bad, it’s still pizza. And just like sex, there are people out there addicted to pizza. Meet Dan Janssen, a Maryland man who has gained a minor level of fame for eating pizza every day for 25 years. In a mini-documentary produced by Vice, Janssen talks about the repercussions of his oddball diet. Here are five key lessons. Pizza obsession is deeper than just a food preference. Janssen says his picky diet likely stems from a few traumatic experiences...