Are you aware about the biological differences between men and women ? 

Clavicles, shoulders and arms are different in males and female skeletons.

There are differences in male and female facial features, although Hormone Therapy (redistribution of body fat & muscle tissue), Jaw & Chin Implants, Forehead Bone Shaving, Face lifting, ... can change the appearance of the face.

Study how male and female skeletons climb and descend stairs, due to mechanical differences in their skeletons.

 Examples: Differences of male & female Skeletons