What I understand is how much women have changed since being given more power and freedoms in society. That right there is evidence of the tremendous effect culture has on human behavior. That’s why disagreeableness is necessary to at least somewhat override social programming. It is notable that disagreeableness is not correlated with sexual permissiveness in men. If this were actually a matter of hormones and both disagreeableness and sexual permissiveness were correlated with male hormones, then you would see the same pattern in men as in women. Instead, you only see this pattern in women. Therefore, it makes the most sense to consider this the result of continued cultural repression of female sexuality.
This also makes sense if you consider the convergence of gender differences in sexual attitudes and behaviors that has occurred over the past 5 decades. For women’s attitudes and behaviors to change so much upon being given more freedom and power in society, to me, clearly indicates that female sexuality was repressed. As many of the same cultural patterns persist to a lesser degree, it is apparent there is still some repression. This repression is readily apparent in how female sexuality is stigmatized by the attitudes described in the original article.