Answer:
I am easy to waste and unstoppable
I am not a toy though many use me for pleasure. I have a butt but I cannot poo.
I cause involuntary movements in your vehicle
What can be heard in court or used to carry briefs?
If you're looking for something sweet I know what to do. But if you don't like heat I'm not for you.
The warmer I am the fresher I am.