My favorite ex-girlfriend is one. She’s genuinely interested in what anyone and everyone has to say, and radiates that enthusiasm.

The oddest thing about it is that even she thinks it’s sort of weird and she actually wants to pull back a bit, but she can’t. She says it’s like a magnet - someone starts talking and she’s just irresistably drawn in.

She actually went to see a psychologist about it, and she said that during the session it slowly shifted so that he was doing most of the talking, then at the end, he told her there was nothing wrong with her and that he couldn’t see her as a patient any more, then asked her out.