Answer:
Better touch me before you proceed to second.
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 stand in one place yet I fill a whole room. I can be filled with molten rock and come in every hue.
Some will use me, others not. Some have remembered, others forgot. For profit or gain, I'm used expertly. I can't be picked off the ground or tossed into the sea. What am I?
I have a foot but no leg. What am I?
What sphinxes employ and players enjoy.