Sitting on a sub's face

I was walking through the woods with my sub guy when I saw a fallen tree truck. On the spur of the moment I told the sub guy to lie on his back on the tree truck. He didn't know what I was going to do. I straddled him and sat on his face and made him sniff the seat of my jeans. Then I turned around and sat there with the fly of my jeans pushed up to his nose. I was amazed he was able to lie there and take this mistreatment - but he did!