Whenever I see women posting such pictures I know them at once to be filthy little trollops and an embarassment to womanhood. Their vile photographs disgust me to a point where I can hardly bear to stare at them for hours.
I think it's because they honestly think they look their best like that (probably not true). My photo also represents the photo of me I like best and in which I look reasonably good. Though my photo is not really representative for me, as In real life I'm in 3D, colorized and without make-up.
I don't really care if its a girl. If its a guy, I get horny.