Answer:
I go through a door but never go in, and never come out. What am I?
I smell like blue paint pours like green paint and I look like a red truck.
I am not a toy though many use me for pleasure. I have a butt but I cannot poo.
When you stop and look you can always see me. If you try to touch you cannot feel me. I cannot move but as you near me I will move away from you.
My second is performed by my first. A thief by the marks of my whole might be caught. What am I?
The answer I give is yes, but what I mean is no. What was the question?