4 ms·

Also thumbs are kinda fat, and don't have tons of dexterity. Using them exclusively for Space is reasonable.

• jacobolus 11y ago
  The thumbs are in fact the strongest and most dextrous fingers on the hand.
  • nwah1 11y ago
    That must be why the phrase "you're all thumbs" means that you have a lot of dexterity.