So... I"m making these new skulls b/c they always sell well and each one is different. So, I'm working on these ones with eyeballs and brains and stuff and I start to wonder about the pupil size. It turns out, after I research it, that you can measure how happy or pleasant someone is by the size of the pupil. A large pupil means the person is happy or excited - a small pupil means that the person is unhappy or upset. As you can see below in the third eyeball from the left a small pupil looks weird... right? Anyway, from now on each eyeball I make will reflect how I feel that day...