I remember, years back, talking to some French guy who went to an American store in France with his girlfriend and tried Pop-Tarts, as he'd heard that a lot of Americans like them. He said "These are terrible! I can't understand why anyone would eat these!"
I asked him whether he'd toasted them.
Apparently
I went and looked on the packaging
at the time, they didn't actually tell you to toast them on the package. Just assumed that you know to do that via cultural diffusion or whatever. Looking on Amazon right now, they do apparently stick directions on the thing, so I assume that at some point, enough people ran into trouble with that that they fixed the issue.