Just a little bit of your own intelligence will help you realize the answer to the question. No need to think too much, just pay attention to the characteristics of the picture. Then connect with the image, the answer will gradually appear.
The Answer is =>>> Because the middle finger is the longest finger on the hand, when working, women often get bumped and break their nails often, so the middle finger is often cut short to avoid broken nails and be more convenient when working.