Synarch, your behavior in this thread kind of baffles me, because I would submit to you that your entire persona on this board is based upon flirting. You engage people, you make innuendoes, you push their boundaries, you play with them and insult them. You do it with both men and women. It's odd, ENTP flirting, but it's still a form of flirting. If your girlfriend took issue with your posting style, would you cease and desist? Or would you say, "Hey, that's just my personality, I can't help it if you don't get it?" I'm not having a go at you--just seems like a bit of a paradox, to me.
For me, intention is everything. Some people have greater flirting/socialization needs. Sometimes I feel confident and more inclined to be social, so I interact in a friendlier way with people, laugh and smile more, etc. But if there's no intention behind it, I will not focus on one individual and make them think that I'm interested. It's just a generalized friendliness, and it's the same whether it's directed toward men or women. If someone mistakes it for intention, I'm up-front about my lack of interest or availability romantically.
I've never dated an ENFP, but one of my good friends is one, and I know on a friend basis, she definitely has friends she values more than others. She'll strike up a conversation and be friendly with nearly anyone, but they don't mean the same to her as her handful of valued friends do.