One of the biggest differences between men and women is their hormones and they are responsible for controlling the sebaceous glands. These glands are very important for any type of sensitive skin care because they are responsible for producing the oil used to protect the skin and help it retain moisture. Any fluctuation in hormone levels could cause an increase or decrease in oil production making dry or oily skin care products necessary. Typical periods of hormone fluctuation include: pregnancy, puberty, menopause and while using birth control.