“Enchant, stay beautiful and graceful, but do this, eat well. Bring the same consideration to the preparation of your food as you devote to your appearance. Let your dinner be a poem, like your dress.” – Charles Pierre Monselet.

Digestion starts from the eyes. As food is to the stomach so also is food to the psychology of the eater. This effect helps prepare the mouth for the incoming food (the mouth-watering effect).

Now examine picture A and B here - http://diet234.com/food-appearance-does-it-really-matter/