My psych adviser promised that she would automatically give a failing grade to any paper that had as its conclusion that some psychological trait was a byproduct of the interaction between nature and nurture. That's not because it isn't true, but that this is so trivially true that no one disputes it.
I'm not interested in the perspectives of your psyche adviser, as he/she isn't here. I'm interested in your own beliefs and your reasons why we should believe they are plausible or likely.
So you either are doing that here, and misunderstanding what a great deal of feminists think,
That can be summed up by simply stating that, for post first wave feminism, much of what western, and especially traditional American culture, consider natural "feminine" behavior, interests, and psychological characteristics are actually social constructions maintained over time by patriarchal institutions and social structures who's interest is in perpetuating the economic, social, political, and sexual (through traditional gender roles and childbirth/rearing) dominance of males over females through various sociocultural myths ("traditional American values") and oppressive institutions (marriage, traditional intact two parent "June Clever" families, heteronormativity etc.) that perpetuate these artificial "ideologies" of oppression through which woman are controlled and channeled into accepted "feminine" roles and limitations.
or you are implying without asserting that traits like concern with physical appearance - which has drastically changed over the past few decades -
Its changed "drastically"? In what sense?
have their variance explained in terms of sexual dimorphism driving cultural influence.
I mentioned nothing about sexual dimorphism. If you will look at my initial statement again, you will se that what I'm proposing is that interactions between intrinsic, internal psychological dynamics unique to females and expressing certain emphasis and de-emphasis, becomes reflected in cultural norms and assumptions, which they support, or encourage, those very intrinsic attributes.
That such inherent characteristics may become altered, exaggerated, or even debased and corrupted, I'm not questioning. What is in question is the longstanding feminist belief that our core concepts of "femininity" are primarily the cultural construction of an oppressive male over-society the fundamental assumptions and observations of which are wholly artificial.