These foods... Do you put them in the fridge or not?

Only the ketchup

All three in the fridge.

Add bread to that list too.

Not a PB connoisseur, but I've never heard of keeping it in the fridge.

What about a stick of butter

No to the peanut butter.

Mostly no to the apple. Sometimes it is refreshing to have a nice cold apple, but I generally don't bother. Now that I think of it, I refrigerate grapes and strawberries. I seem to be pretty inconsistent with my fruits. Is it just random and arbitrary or is there a reason I learned it this way?

I refrigerate my ketchup.

I have noticed that syrup (e.g. maple syrup) is one of those things that goes either way with some people. I never make pancakes or waffles at home, so I don't even have a preference.

none of the above go in my fridge. I like my ketchup and peanut butter room temp.

Ketchup after it's been open.

All three in fridge

Whipped peanut butter is the shite

Negative on PB
Yes on Apples
Yes on Ketchup after opening.