I doubt (now I can't speak for all INTPs) that we're the type to walk up to a girl, in a Jersey shore accent, "Eh Gurl, How you doin'" "dat ass looks fine, let me get yo number"
Maybe I'm just conditioned to this growing up in NY and learning how half the time, the extroverted direct flirting is, and how more times then not, seems to get results. Just baffles my brain, but I've come to understand that many girls out there aren't bright cookies.
Flirting for our nature I would think is more indirect as
@ImNiceToPuppies suggested, 'let the chemistry happen'. I like this idea. I don't like forcing too many things, I like to be more silent and observe, more along the lines of almost hoping chance would push us together and something magical would come of it.
I've been learning now that flirting should be more direct, to differentiate yourself from either a friend or someone seeking a relationship. I OTOH more often then not, like the idea of a friendship turning into a relationship. I'm never in a rush to push it to become an official relationship.
Hopefully you can take these cluttered thoughts and ramblings into something coherent, but tl;dr: Flirting is different from each person-person interaction, if you want to assign it to our MBTI type, I would think it's very-indirect, observant, never pushing, always listening, we'd see our flirting as giving you our time and overall direct attention, something we value above just about most other things in life.
