This is wild.
You put your Mezuzah up on the right side of the doorframe. The problem is that your door has two right sides – it depends on which way you are facing. When you walk in, the right side is on one side. But when you walk out, the right side is now the other. How did that happen?
A mirror is even crazier. Why does the mirror reverse the right and left side of the image but not the top and bottom? It doesn’t make any sense – it should reverse all or none.
Think about it. Does your brain hurt? Watch Richard Feynman – a Nobel Prize winning physicist – try to explain it: