BAD IDEA
Can I smell someone's fart?
Yes, you can, but don't expect a fragrant bouquet or health benefits.
Sure, you can smell someone's fart if you really want to, but be warned: it’s not going to boost your health or social status. Farts are mostly harmless gases like nitrogen and methane, but they often carry unpleasant odors. Breathing them in won’t kill you, but it definitely won't earn you any friends, and might just make you regret it.