All through the "Half-Blood Prince" matinee I attended today, I couldn't stop thinking about those buttons on the Potions Master's coat.
I've mentioned them before. I thought I wanted to lick them. But today I realized that they are cloth, not glass, and they would need to be bitten instead.
Bitten off one by one. While he waited impatiently but with a stillness born of well-practiced discipline. While the frock coat opened just a little bit more. And then a bit more.