The only thing I can think of that might potentially explain the lower average level of physical attractiveness among black women is testosterone. Africans on average have higher levels of testosterone than other races, and testosterone, being an androgen (male hormone), affects the physical attractiveness of men and women differently. Men with higher levels of testosterone have more masculine features and are therefore more physically attractive. In contrast, women with higher levels of testosterone also have more masculine features and are therefore less physically attractive. The race difference in the level of testosterone can therefore potentially explain why black women are less physically attractive than women of other races, while (net of intelligence) black men are more physically attractive than men of other races.

Satoshi Kanazawa

African women tend to have more testosterone leading to more "masculine" secondary characteristics, which non-africans tend to not find attractive. Miscontruing these features in African women by saying that they must be men shows a lack of understanding of these genetic differences.