There's about 5 women I see day to day that look at me like they want to see how far they can fit my cock down their throat. Must be something about the 9-5 that does it. It's fun when there's an obvious rapport and you're both aware of each others presence, you can sense little movements, even the briefest of looks, playing with hair, sometimes obvious stares, and you can play with the tension. I'm already thinking about the woman who I see first on my commute tomorrow.
I mainly think about the tension when we get close, how things would unfold from there - nothing specific like "oh I'd flip her over and do this" more of a haze where you would just envelop each other. For me it's more of a mood than a porn film playing in your head. Each girl has their own feeling they inspire in me, some I would want to start gentle with, some very rough, it's about the connection.