"in reality, gender has nothing to do with feelings, opinions, attitudes and personality. Those things are individual, not gender-based." I mean, if you say so. I thought it was pretty widely acknowledged that gender had something to do with one's individuality. As you said, there are predetermined conceptions about femininity and masculinity, and there is the physical sex of male and female. However, any understanding of our physically male or female bodies is obviously going to be arrived at from our singular perspective, within the confines of predetermined conceptions. So then gender most certainly does have to do with personality and attitudes. I mean, if this is purely "based" in the individual, then tell me what the individual is based in.