@merrymouse
1) Which behaviours do you think are natural in women?
Do you mean nature vs nurture or do you mean what behaviours do I think are more typical in women for whatever reason?
I think women are naturally less adversarial.
I think they tend to see nuance in argument.
I think they're more sympathetic.
I think they are more risk adverse.
I think they demonstrate 'nesting behaviors'.
I think they are more likely to shy away from physical confrontation.
I think they are more likely to consider consequences before actions rather than acting on impulse.
2) Why would you think that these behaviours are not also natural when they are observed in men?
Because if you compare one woman and one man, the woman may not have ovaries. She may not simply have XX chromosomes. She may be taller and heavier than the man, have bigger feet and have hairier arms. She may have ADD, be colourblind and better at throwing and running.
However, when you look at large numbers there are clear differences. The argument is not whether there are differences between the sexes but whether they're learnt or innate or, to put it more appropriately, where on this continuum the influence lies.
I have little time for radical morons on either side of the debate.
3) Why would the absence of these behaviours lead you to conclude that somebody is a man?
Who said it would?
However, if you ask me about the absence or presentness (?) of these behaviours for 10,000 people, I'd be right a lot of the time.
3) What difference does behaviour make anyway? Why do you need to classify people into 2 groups according to your assumptions about their behaviour?
I don't. I don't feel the need to classify anyone.
Do you feel the need to belong to a specific class? I like to judge each person on their merits whilst acknowledging biological and psychological trends.
I think the need for classification is only important as an explanation for observed trends as a rebuttal to unfairness. Things like gender pay gap or attainment in different fields or why black people don't do well in aquatics or why they do very well in long distance and sprint running (but less so in middle distance) or why white people are underrepresented in basketball or why male vets are few and far between etc.