Answer:
When young I am sweet in the sun. When middle-aged I make you gay. When old I am valued more than ever.
I can go through glass without breaking it.
I wonβt break if you throw me off from the highest building but I will break if you place me in the ocean.
You use a knife to slice my head but you weep beside me when I am dead
My first is high my second damp my whole a tie a writer's cramp.
No matter how little or how much you use me, you change me every month.