I see a bike much more than a metro (passengers have almost no control) as a 'freedom-' (you can ride wherever you want) and an 'expression-of-my-will-' (when t

I see a bike much more than a metro (passengers have almost no control) as a 'freedom-' (you can ride wherever you want) and an 'expression-of-my-will-' (when to ride and where to ride to) device. It's not only the benefit of physical exercise which often makes riding a bike more enjoyable.