My theory: People are treating them with different degrees of reverence. They are careful to polish anything off the IPK, causing it to lose weight gradually th

My theory: People are treating them with different degrees of reverence. They are careful to polish anything off the IPK, causing it to lose weight gradually through abrasion. The others gain wait through random adhesions, perhaps oils picked up by gloves used to handle them. I'm just some random guy on the internet, I know. It's fun to have theories!