Hello have you ever eaten wedding cake?
I have many times!  They re delicious!  What is the most popular flavor?
Well buttercreme and chocolate are the most popular.
Those are great flavors!  Were wedding cakes always a thing?
Yes in western culture. Traditionally they are served to bring good luck to the newly weds. 
I didn't know there were for luck!  Very interesting!  Are wedding cakes usually expensive?
They can be, but typically they are priced by the size and how much components are used. They are also priced by the serving.
That makes sense!  I image wedding cake bakers have to not only know how to bake, but be artistic as well, right?
Yes, pastry chefs or cake designers create these works of art that typically reflect the personalities of the couple getting married.