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The dark and different color of the nipples and the halo around them returns to the body's hormones. During puberty, the flow of estrogen and testosterone causes the body to produce more melanin (a pigment that determines the color of your body from hair to face masks). That is why during the puberty of the color the penis and the edges of the penis are darker than the adjacent points.
9 Scientific answers to the important questions that you are embarrassed to ask
The dark and different color of the nipples and the halo around them returns to the body's hormones. During puberty, the flow of estrogen and testosterone causes the body to produce more melanin (a pigment that determines the color of your body from hair to face masks). That is why during the puberty of the color the penis and the edges of the penis are darker than the adjacent points.