Answer:
There was a girl half my age when I was 12, now I am 66, how old is she?
Open me, and you can't see me without a mirror. Close me and you can't see me at all. What am I?
When young I am sweet in the sun. When middle-aged I make you gay. When old I am valued more than ever.
I shoot but never kills
I encourage people to run home and steal
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.