The reason why sushi is served with 2 pieces

Do you know why sushi is served with 2 pieces?
Amazingly, sushi used to be as big as a tennis ball. How big it was!
It was hard to eat in one bite so sushi was cut half to make it easier to eat.
That’s why sushi started to be served with 2 pieces.
This is one reason. I will post the other reason next time.
Have a great weekend!