Peter talks about 3 legged dogs a lot and that they seem to be totally at ease since they don't hold their situation as a predicament. So here is a video of Deuce, a dog with just 2 legs left.
Watching my mind while watsching this video is insightful, noticing that I tend to hold things like "There is no way that little fella can be this happy. How is it even possible that he is able to walk." Revealing how I hold my happieness and my ability to be so much dependent on my corporal integrity.