Oh, for fuck’s sake.

Your thumb is not your zeroth finger; it’s your first finger.

Starting from zero is for situations when you’re counting the left (or first) edge of containers used to hold items. For example, if you wanted to count the number of balls you could hold in the spaces between your fingers, you start with 0 because the number of balls you can hold between your thumb and {} is 0.

0✊

8☝️

9🤘

12✌️

17🤙

25🤟

31✋