This study’s a stinker. Researchers decided to find out how frequently we fart in a day, counting the gas passed by 6,400 people across Australia — and collecting data on all 360,192 of their toots. Given how flatulence can give us insight into gut health, it’s surprising how little we know about the line between what’s good and what’s excessive, researchers say. Researchers had participants log their farts in an app called “Chart Your Fart.”…