[readthenotes1]

Don't we already have a ton of neurons in our digestive system?

I believe they are the ones that give us the voice in the back of our head that says that yes we can buy that entire box of popsicles and not eat but one at a time.

[mcbits]

I think those neurons are what give me an icky feeling every time I eat certain things that have been associated with getting sick in the past, even though the foods aren't what made me sick.

[MagicMoonlight]

Yes. The phrase “gut feeling” is actually literal because your gut has feelings and can control your body.