Christmas party

A few years ago, we invited some friends over for a Christmas party. Many of my colleagues were there, and many of them are German. Helmut, Franz, and Rudolf were there.I was talking to Rudolf about his belief in the superiority of the communist party. I grew tired of the discussion so I motioned towards the window and commented on the weather, "I believe it's snowing". "No, it looks too wet to be snow," he said. The argument went back and forth for a few minutes: rain, snow, rain, snow...
Then my wife came over and settled the argument for us. She said: "Rudolf the Red knows rain, dear!"