Here's a breakdown of why:
* Personal Style: Nail polish is a form of self-expression. You can choose whatever colors and designs make you happy.
* Practicality: Matching all the time can be limiting. You might want a fun, bright color on your toes but something more subtle on your hands for work.
* Trends: Mismatched nails are a popular trend.
* Variety: Having different colors on your hands and feet allows you to experiment with different looks and color combinations.
Ultimately, there are no rules in nail polish! Do what you like best.