Answer:
I am the kind of soda you must not drink. What am I?
I shrink smaller every time I take a bath.
Sometimes I am white, sometimes I am dark. Most people love me. What am I?
I can be short and sometimes hot. When displayed I'm never cold. What am I?
I am not a toy though many use me for pleasure. I have a butt but I cannot poo.
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?