Harry had a thin face, knobbly knees, black hair, and bright green eyes. He wore round glasses held together with a lot of sellotape because of all the times Dudley had punched him on the nose.
Now, I'm going to just check on the rice, and you can see - look at that - that's what sushi rice is all about, and that's what makes great sushi is because the rice all sticks together.
And in the bulk material, there are billions of these, and the similar components try to stick together, and the opposing components try to separate from each other at the same time.