A YouTube "expert" who explains stuff, shared a few fart facts. Did you know that 99% of your sphincty gas is odorless? It's the 1% of your flatulence that's composed of hydrogen sulfide that stinks.
There's also an odor limit. If farts were 30-times stronger they'd smell SWEET, and if they were 100-times stronger you wouldn't smell them. And, it may not be medically possible, but in theory, a super strong flatus could kill you. Yes, silent but deadly.