Cake decorating is fun, the sugars are used so that you can frost boring cakes, making them be more pleasing to the eye.
I don't know the first thing about cake decorating!  How does a person even learn how to do that?
Well, there are many classes, but it was first said to be created by a French bakery back in the 1840s. The bakery wanted to get more money for their cakes so they decided to decorate to make the price increase seem worthwhile.
Interesting!  Leave it to the French to make food look and taste better!  What is your favorite kind of cake?
Cake decorating
Cake decorating is one of the sugar arts that uses icing or frosting and other edible decorative elements to make plain cakes more visually interesting. Alternatively, cakes can be molded and sculpted to resemble three-dimensional persons, places and things.
Cakes are decorated to mark a special celebration (such as a birthday or wedding). They can also mark national or religious holidays, or be used to promote commercial enterprises. However, cakes may be baked and decorated for almost any social occasion.
History.
The members of the audience are the guests you invite into your house. You give them the gift of the performance... The idea is that it's important to get the piece across well so that the people can enjoy it more. The fun of it is the fun of sharing something you can do well." 
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