This is every man's dream, I suppose.
You drive on the highway, a girl waves at you, you stop.
She wants to go to the next town.
She's looking for a lift (ride, for Americans).
She's not that hot, or maybe she is, but who cares? A fuck is a fuck.
And, yes, that's on your mind.
And it's very visible.
She can read your mind.
To make a long story short, she's responsive to your advances.
She grabs your cock, already hard. She gives you a nice rub.
So you stop at the next car park and fuck her senseless.

The question is: has this ever happened to you? Not in your dreams. For real.