I never have! When I first got my license ages ago, I asked my dad to show me but he said I wouldn't have the physical strength to do it. I've never changed a bike tire either!
When was the last time you hung something on the wall?
Last time I whistled was yesterday. I whistle a lot around the house-- just an unconscious thing. I used to sing, but my throat bothers me now. Btw, I'm neither a great singer nor whistler. Good thing I live alone: )