As humans , why are we satisfied of certain foods being (cold/hot)

[SvennoJ]

Kristof81 said:

Fats best served warm, sugars cold.

Oliebollen taste good when cold as well, but you tend to add extra powdered sugar when eating them cold.
Actually donuts are always eaten cold.

As for sugar, you do tend to have more sugar in ice tea/coffee as compared to hot.