[[why does Mayuri always have things on his ears?]]
YESĀ here we go! Some headcanons about Mayuriās ears.
The very firstĀ body-modification Mayuri did to himself was the removal of both external ears.Ā It was done because of several experiments. He had long been interested in being able to regulateĀ his hearing, making it selective.Ā ( He didnāt want to hear all the noise the other children at the orphanage was making ). The first ear piecesĀ that he designed were simply meant to selectively make him hear only the things he wanted to hear. When people of a certain age and reiatsu pattern made a sound, he couldnāt hear it.Ā He also usedĀ his ears in several experiments.
Another good thing about the removal of his external ears was that it made paintingĀ himself a lot easier.Ā
Throughout his life, he has changed up his ear pieces, giving them different functions. He has also modified his ear canal.
Mayuri can remove his ear pieces completely, including theĀ ā innerĀ ā one, but removing the latter disturbs his hearing.
All his ear pieces have the function of giving him selective hearing, when he wants things to be quiet.
As for the aestheticsĀ of them - Mayuri always goes with a goldĀ design for them, as Mayuri simply likesĀ the color. He likes a certain consistencyĀ to his color theme ( the gold matches his eyes ), because otherwise it would look messyĀ ( hence why he only paints himself black/white ).