>>25 You are right that "nice" guys are not nice on purpose, and it's just a spontaneous behavior. The problem is that being nice alone is not enough. You still have to show masculinity, in order to raise sexual interest from a woman. And to display masculinity does not mean to be a jerk. It involves physically touching the woman, not be afraid of speaking about sex and love, and basically show that you are sexually inclined and not a "neutral" friend.
Once again, this does not mean to be a jerk, or imposing yourself on the lady. I hope the distinction is very clear....