I'm familiar with the colloquialism, but usually there is a barrier to the thing you can't wait for and the actual activity, and sure I get your point about the artificial options regarding the swinger event, but that those options exist means there is no barrier to a little prematch party, even if it was nothing more than a kiss and a fumble (I couldn't even give her ass a playful slapPeople say they can't wait all the time, what they mean is that they're looking forward to something in the future. In reality, unless you have the power to control space and time you have no choice but to wait
In discussing the scene, I would say that Nef's intention for Kyle and Marie is that they're swingers and want Steve and Angela to join them on that basis. As a player, you have to option to reject that if it's not your thing but it's unlikely that their characterisation will change as a result
That Scene was over flowing with potential all missed (she didn't even flash us to get our juices going
Maybe I just feel it more because I crave more dark meat in my diet, seems like almost every game has only one dark girl who is almost always a minor side character and has only one or two short scenes.