OKAY -- Quick qualifier. I'm of the belief that both men and women are horny and enjoy sex to a roughly equal extent. That being said, the question is coming from a Male -> Female stance. Onto the question

Many niceties are an act of manipulation. For instance, a guy buys some random girl a drink the bar. Perhaps he got a promotion and is feeling generous, but likely he is trying to keep her around like enough to end up sleeping with her. How about skipping all that so both parties can enjoy their time without a subtle expectation of either how to get out of the situation or how to finally cut to the chase. So, how do you women feel about a guy asking in a playful way from the start: "Look, I'm only out tonight because I'm looking to have some playful and hot fun. So, let's not waste either of our time -- is that what you're looking for?"

Thoughts?