because they are sweet!
cupcake(noun) Small cake baked in a muffin tin.
Cupcakes are made of ingredients such as flour, sugar, baking powder, salt,...
A baking cup is an accordion-sided paper or foil cup in which cupcakes and muffins...
A cupcake yummy! Eat it and spoil your lunch!!
I didn't eat it, I promise! I think it is still in the kitchen, on the counter.