Survivors of strokes often have limited or no use of one hand. They have to learn to adapt to do things that most of us take for granted.
When I was in college, I had a brace on my left hand for several months. Although I am right-handed, I never realized how many things I could not do because of the brace. I can only imagine the things for which a stroke victim has to learn to compensate. A simple act of tying one's shoe is made much more difficult when you only have one hand.
Here is a video I found of a child tying a shoe with one hand and limited use of the other hand.
Why don't you try to do a few things with just one hand today?