Answer:
I am a key that is playful. What am I?
Whoever makes it, tells it not. Whoever takes it, knows it not. Whoever knows it, wants it not. What am I?
I am found on Mercury Venus Earth and Mars but not on Jupiter or Saturn. What am I?
I am the reaction after enjoying soda.
Squeeze me and I cry tears as red as my flesh, but my heart is made of stone. What am I?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?