Answer:
I am there when you sit, but gone when you stand. What am I?
I am free the first time and second time but the third time is going to cost you money.
What gets whiter the dirtier it gets?
I am the type of room you cannot enter or leave. Raise from the ground below I could be poisonous or a delicious treat.
I cannot be burned in fire or drowned in water. What am I?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?