Why Do People Prefer The Smell of Their Own Farts Over Someone Else's?

While nobody truly enjoys the smell of farts, studies have shown that people prefer their own odor over someone else’s. The reason for this is two-fold: the bacterial population in your body is specific to you and, from an evolutionary perspective, it is the brain’s attempt to avoid interacting with possible sources of disease. 

To learn more about human flatulence, watch the three minute asapSCIENCE video below. 

[Image: Flickr CC/ themonnie]