Answer:
When young, I am sweet in the sun. When middle-aged, I make you gay. When old, I am valued more than ever. What am I?
I am Invisible Man's drink at snack time
Flat as a leaf, round as a ring; have two eyes, can't see a thing. What am I?
I go around in circles, but always straight ahead, never complain, no matter where I am led.
My days are numbered.
Both old people and owls are said to be possessing this trait