Answer:
I am just two and two. I am hot. I am cold. I am the parent of numbers that cannot be told. I am a gift beyond measure a matter of course. I am given with pleasure when taken by force.
I am often sold by children entrepreneurs in summer time
Take it and you will lose or gain more than the others.
The last man on Earth received a phone call, who was the caller?
Use me to reward good behavior.
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?