Saying Hello

I watched the outside cats the other night. They were standing up at the back door. The screen on the door is useless at this moment. I noticed they were sticking their hands in the opening and I didn’t understand why. Once I walked over there, I saw Oreo on the other side of the door sticking his paws out to say hello. These cats are sure funny. The inside cats and the outside cats usually communicate through the doorways.