Therefore Otto spent a week holidays in our apartment where we lived at that time. In the middle of the apartment was a rather big hall from where all doors were leading to the different rooms. One door was a mirror ! Otto loved the mirror or rather the reflection of himself. As soon as he had discovered his "twin" he walked along the mirror tail up and in parade position and admired himself. He tried to sniff at this cat, but only found the rather cold mirror. Then he discovered that the reflection did the same moves as he did. He lifted a paw, the other cat lifted a paw too. He turned left and then right and the cat in the mirror did the same. And we watched him and laughed our heads off. No TV needed !

Otto also was happy, he admired himself each day and spent long hours in front of the mirror and watched the strange cat who did exactly what he did too. I think he spent very nice holidays !
Not all cats can see their reflection in a mirror. They stare at it but don't see nothing. That's the case of my 3 cats. I can put them in front of a mirror or a wall the result is the same.

Others see another cat and start to fight
Or they watch their reflection for hours with a very mistrustful look

sometimes it also happens that they are scared and run away

or they watch their reflection for hours to see if it moves or not

Some become affectionate

Or are very surprised to see something in this strange frame.
Reflection
