INFPs are totally crafty and far more emotionally brash than people would have you think. Holding a (reciprocated) gaze with a girl is not only hot, but will almost certainly be pursued. Unless it's like, y'know, at an airport or something.
I admire beauty in all forms and I seek it out at all times. Often, I simply gaze at the most beautiful "thing" in a room; for example, in a train carriage that could be a person, a magazine I'm reading, or the scenery outside the window. Beautiful women are no exception and I often find myself just gazing at them rapturously. If I were single, and there was a response to the gaze, I would tend to think "game on" in a somewhat Byronic sense, if you will: romantic folly and all that.