Not sure what I can offer, first I suck at writing fiction second, I have lived most of my fantasy and surprisingly enough they all paled when compared to actually living them.
Wait I do have one that I haven't lived, and for the drivers here in colorado they better hope I don't.
I am in a big convertible with a gorgeous redhead with with some lou reed playing or maybe some Smokey Robinson. She works my pants down and off me while we are doing about 60 and then begins kissing my body all over. After mouth cleaning my cock she slides herself over my hips and guides my cock into her, oh god new one would be into her ass have to think about that one, and rides me as I attempt to not become airborne or tree stopped. Her skin is chilled bumped but that seems to make up for lack of being able to touch, since the wind is playing her body. Of course she climaxes and has to regain herself to get me off, the truckers are surrounding us and as she climaxes the blow their horns putting a different spin on her climax.