Comment on male and female secondary sexual characteristics in terms of their biological expediency

1. The smooth lines of a body having a layer of subcutaneous fat
2. Slim waist and wide pelvis
1. Convex relief muscles
2. Strong torso with a narrow basin.
Secondary sexual characteristics of women are associated with their reproductive function. The flowing lines of a body with a layer of subcutaneous fat provide a store of energy when bearing a fetus, and a thin waist and wide pelvis are needed to make it easier for a woman to give birth to a baby.
Convex relief muscles and strong torsos with a narrow pelvis are necessary for a man so that he can get food and protect his offspring

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