There is a reason humans have a well developed sense of smell.

Both visual and tactile feedback can often fail when scanning food for rot or spoilage. Olfactory feedback is the most reliable. It's why you instinctively smell old food before eating it, even if you see no mold or discoloration. We've evolved to use this as a survival mechanism.

It is also the reason why you can handle seeing sick shit on a screen, or even in person, but you can't handle foul smells (a clogged toilet, a piss stain, puke, etc...).

Biology is cool.

@TrevorGoodchild may have more to add.

RT: https://bae.st/objects/f78931a5-3b68-4b30-8c5d-61c63295cd44