Our body is very lazy, so food, on which it does not have to spend extra energy (to warm it up), is perceived by the brain better than cold food.
Not all. If we are talking about hot snacks and soups, for example, then hot food, firstly, additionally irritates the tongue, and secondly, it better gives off volatile aromas. In addition, in some cases, a higher temperature when serving food is necessary to avoid the crust of fat.
Although not all dishes are tastier hot than warm.