Let's not extrapolate beliefs here.  Beliefs create the traps we find 
ourselves in when we try to discuss issues related to gender 
socialization.  Beliefs lead to expectations, and expectations lead 
to judgments of other persons.
Yes, of course there are physical differences between men and women, 
it would be silly to claim otherwise.  However, there exist 
individuals possessing physical characteristics of both genders, 
calling into question the significance of these differences.  There is 
also some compelling brain research to the effect that there are 
some differences in the way each gender processes information, but no 
one has yet made a compelling case that these are significant enough 
to form a basis for gender roles.  
My focus is more on the way we are taught to behave, the ways we are 
taught to think, the expectations that we are told we can have, and 
the ways in which a given society would enforce these norms.  
Concepts of femininity and masculinity vary so much from culture to 
culture and have changed so much over the centuries that it is high 
testament to the power of socialization processes that we buy into 
these concepts.  
To me, actual (as opposed to constructed) gender differences boil 
down to to things:  reproductive choices and the tailoring of one's 
clothing.  That's it, period.  Anything else is a culturally-based, 
sociologically-based, education-based, or faith-based expectation.
Sin,
Kathryn Aegis
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