Not to mention, the end is the most exposed and vulnerable part of your hair. How many times have they been washed, styled, or straightened? How many hats, scarves, and sweaters have they touched? How many cold, windy, dry, and humid days have they seen?
Depending on the length of your hair, the ends may have been with you for several years! Just imagine all the things the ends have seen and been with you through. Your hair grows from the root, so the end is the oldest part of your hair.