[Honestly, no one else from his world would be able to tell her why he is like this either. He takes her extremely doubtful expression in stride and elaborates with all the self-assuredness of a subject matter expert.]

Why do you need fairies for frost? Or spirits for storms? Some of the most powerful elements of this world - well, any world - simply require some supernatural coordination. Mayonnaise, the condiment of condiments, the crown on every dish, is among those outstanding phenomena.

[Why did he switch to sounding like he's giving a university lecture of dubious quality?!]