Jon Sitting Down?

If there is one thing that I have not manage to get Jon to do, it is the "Sit". He just won't sit. No matter how hard I press his back down, his butt won't go down. In the six years he has been with me, I have only managed to see him sit less than 10 times.

So, a few days ago, after cleaning the dogs' enclosure and wetting it, Jon squeezed himself to a dry corner and sat down. I had to quietly take a photo shot from a window so as not to make him notice me, and stand up.