Tea Ceremony tea is famous for being very bitter. As such it's become a custom in such ceremonies to serve a red-bean filled Japanese sweet beforehand to offset the bitterness. If you do it all correctly there are rules for every aspect for the ceremony, including how you hold and eat your sweet.
I guess that is why they call it CEREMONY. I once saw a tea ceremony demonstration, but could not understand it. I did not know that even the one drinking the tea had to learn a protocol. Very interesting, thanks for sharing.