Is this a cultural thing or what? I've seen a lot of discussion about this in the comment section of the page too and it puzzles me. Because at least here in Finland it's the definite norm to eat cake with a small spoon. As is supplying the guests with one if coffee with cake or the sort is served.
You're right, this is a cultural thing! I talked about it with a Finn and they told me they would eat cake with a small spoon. They also told me Finns usually don't even have such small forks. Apparently cakes in Finland are generally soft enough to eat with a spoon. I wouldn't eat for example apple pies with a spoon, because they're too hard, but I heard that Finnish apple pies are soft enough to eat with a spoon. So maybe this cultural difference is based on the hardness of cakes.
(Just a mere hypothesis.)
(Here in the Netherlands, if coffee with cake is served it's the norm to supply the guests with a small spoon for the coffee (in case they want milk or sugar) and a small fork for the cake.)
But it gets even weirder!They even told me if coffee and cake is served, the guests only get
one spoon for both their coffee and cake! So they have to stir their coffee with a spoon to also eat their cake with! Barbarians!
We'd only do that in case of emergency: when we're out of our precious small forks.