I'm trying to break out of it, be a bit more flirtatious with girls (really must start calling them women soon...) that I like. For a while I was in the weird situation that I could flirt happily with girls that I *wasn't attracted to* - I guess because if it got too serious I could say honestly that I was just kidding around.
Intentionless flirting is really a lot like what I would call banter - those straight-faced conversations where you try to out-funny the other guy without admitting that you're both talking balls, like discussing the best way to raptor-proof your house. By that analogy I suppose "proper" flirting would be banter with a mental patient: discussing the best way to raptor-roof your house without being entirely convinced that the other guy isn't honestly scared of a dinosaur attack.
Slightly scared that I just compared women to mental patients and sex to being mauled to death by a velociraptor. This explains a lot about me. It is also a fantastic cautionary example against stream-of-consciousness typing whilst high on coffee.