Therefore it does not have the usual protection layer of sweat and body oils which keep the skin smooth, inhibit pathogens, and regulate warmth. For these reasons, the lips dry out faster and become chapped also easily.

Contrary to the effects of testosterone on a man's facial structure, the effects of a woman's estrogen levels serve to maintain a relatively "childlike" and youthful facial formation during puberty and during final maturation. It back-number been shown that the extended estrogen a girl has, the larger her eyes and the fuller her lips. Surveys performed by sexual psychologists have Lip Plumper also found that universally, men find a woman's full lips to be more sexually attractive than lips that are less so.