I'm not sure the answer to your question, but people always approach me too. Maybe it's just me and not my hair- maybe I just look friendly. Or maybe it's just because I live in the middle of nowhere (vs. a big city) and everyone is friendly. :P
It would be interesting to do a little experiment- straighten your hair for a bit and see what happens.
Type 2B with some 3A spirals in the front and underneath