When I was around 6, my cousin told me that whenever you smell something, it's tiny particles of that thing floating into your nostrils. So when you smell poop, or even farts, its actually poo particles floating into your nose.
I was pooping on the toilet at the time.
First I plugged my nose.
But then I was breathing through my mouth.
Ahhhh!!!! Shit in my mouth!!!!
I closed my mouth.
I tried to hold my breath.
Turning blue, I lifted my nightgown to cover my mouth and nose and breath.
I panted a little.
Then she said the particles are so small they can get through your nightgown.
So then for about 10 years I tried to hold my breath every time while going for a world's record in fastest crapper so it wouldn't get in my nose or my mouth.
Heaven forbid, she bring up this minutia while we're baking brownies. Twat.