I started riding bikes about fifty years ago. Much of the time I feel like an "old man"...especially in the morning when the 'ol joints aren't working so well. But, out on a bike, it feels as if Ike is back in the White House and I'm off on an adventure.
Last night, I saw a brother and sister riding down the road. About ages ten and eight. Baseball gloves over the handlebars. And, seeing them gave me a vivid recollection of how great it was to be that age, and your world and your freedom had suddenly expanded because your bike could whisk to where you wanted to go.
I don't think it is possible to feel both old AND cranky while riding a bike...