The natural world uses the perception of what is beautiful for humans to signal important messages to others of our species, including suitability for raising offspring and status of health and vitality. These messages are essential for survival of the human species. Specific geometric ratios within the human face are universally subconsciously recognized as beautiful and these carry across all cultures, ages, and both sexes. In Course 2, the skin’s multi-step pigmentation process is thoroughly explained. Ethnic variables and gender differences in skin are also thoroughly discussed.