Ask any boy, man, or honest woman on this planet and they will tell you that farting makes them happy. And those brave souls who embrace their flatulence instead of avoiding it now can use science to support their claim. According to research published in the journal Microbial Ecology in Health and Disease by a team of Russian scientists, the gasses in your farts may be acting as “gasotransmitters that affect your brain, mind, and behavior.”

As it turns out, maybe my wife is right by calling me a "Smart-Ass"

https://www.yahoo.com/tech/according-microbiology-research-farting-makes-180400209.html