Last night we were having dinner and I said: can a person make broccoli cheese where instead of a cauliflower you have a broccoli?
And both my parents said yes, and Felix looked quietly confused. I asked him what, and he said "I don't know why you would do that."
And I said well it's because it would be delicious, and then there were a series of I suppose half-questions, the upshot of which was the "revelation" that he thought cauliflower cheese was like a block of cheese that had small pieces of cauliflower in it. "You know how blue cheese has blue in it? Like that," is what he said. The confusion of course now makes sense - cheese with bits of broccoli in would be probably horrible. Although so would a cheese with cauliflower in.
Everyone has those stories where they go: Until I was sixteen or whatever, I thought something adorable, and then I was humiliatingly set straight by my mother/a cashier at Buxtons/etc"
I don't think this is one of those stories though. There will probably never come a point in Felix's life were it will seem ludicrous to him that he ever thought that.