Why do we fart? Farts are gross , yet occasionally funny , and ultimately an inevitable part of family life. Although farting might seem uncouth, the scientific consensus is that farts are nothing to worry over, and couples should neither shy away from nor feel ashamed of passing gas in front of each other. In fact, holding in farts might be an unhealthy practice, and it can definitely be an unsavory one — trapped intestinal gas can be reabsorbed into the bloodstream only to reemerge as bad breath. Farts may not be a sign of good manners, but they are a symptom of good gut bacteria and a healthy diet. Farts satisfy three different philosophical theories that help to explain why some things are funnier than others, one study found.