Answer:
What goes up but never comes down?
I am the ultimate killing machine used not once but TWICE I can be made by humans.
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 wear a red robe with staff in hand and a stone in my throat.
What tastes better than it smells?
Give it food and it will live, give it water and it will die.