Slight hijack, but I thought the OP’s question was neatly answered by the title of the very next thread: “A question of dog responsibility”. Always works for me.
The smell is produced from compounds in food, or compounds created by bacteria and digestion, especially nitrogen and sulfur compounds; thus protein-rich foods are notorious for smelly farts, as are sulfur-rich foods (not always though; beans are high in protein but don’t make smelly farts):
This is inaccurate. It’s absorbed into mucus, that’s true, but then, after interacting with olfactory receptor neurons in the olfactory epithelium (not the olfactory bulb), and inducing a temporary configurational change in olfactory receptor proteins, the odorants are let go and cleared out (probably down your throat and eventually, out the backside)
But still, ewww gross! All I know is that someone’s fart molecules are entering my face, and proceeding through my head. Perhaps to even find a home there.
I question this, but I will not ask for a cite. I question it because one time I shaved my ass, and the only disconcerting thing about having a shaved ass was that I could no longer sneak out farts like I used to. It seems I removed the little bit of material from between my cheeks that gave a bit of breathing room to vented gases, and it was definitely my cheeks that were vibrating; I can neither confirm nor deny at this point whether my anus was also vibrating.
