Answer:
Left to right Iām quite bright. Right to left I might bite.
When young, I am sweet in the sun. When middle-aged, I make you gay. When old, I am valued more than ever.
Round as a button, deep as a well. If you want me to talk, you must first pull my tail.
It's been around for millions of years, but is never more than a month old. What is it?
A hole in a pole, though I fill a hole in white. I'm used more by the day, and less by the night.
I go in hard, come out soft. Blow me hard and I'll make a pop. What am I?