[jghn]

When people say they have "food poisoning" and blame it on something in particular I always point out that it's almost never what you think it is.

However, even knowing that doesn't help a whole lot with the queasiness that one associates with that food item. I've had a few GI bugs which have caused me to never be able to eat at the "offending" establishment ever again, even though I now the likelihood that the mental connection is correct is near 0

[just4themoney]

I got sick drinking a bit too much limoncello once day. Now I can't stomach lemon flavored seltzer. I taste it and feel like I'm going to vomit.

[weaksauce]

That's called taste aversion.