Answer:
What is it that given one, you'll have either two or none?
They keep secrets locked away. And you pass through them each day. For each one there is a key, They respond to sesame.
You feel this sensation when you are dehydrated.
What gets colder as it warms up?
Goliath, The Jolly Green and Andre are all examples of this.
People take me on walks and I run and have fun. What am I?