The most popular penis color among women (sex knowledge adult novel)

The more you have sex, the darker your penis will be, the stronger your skin will be, and the longer you can fight. Getting more sun can make you look like an elephant, but don't forget to apply sunscreen. As the saying goes, the levels of penis that women like are "one wild goose, two black, and three purple". Especially black penises, which leave a particularly strong impression on women.
On the contrary, a white penis, no matter how heavy it is, still feels bubbly and does not leave a strong impression.
Maybe it is a little thinner and shorter, but the black color gives people a strong and powerful feeling, which stimulates women's expectations. When it comes to sex, it can be said that starting from the visual part, the dark penis has already occupied an extremely advantageous position before it is actually used.
The reason why the penis is black is mainly due to the precipitation of melanin. The more times you have sexual intercourse, the more irritation the penis skin receives, and the more melanin is deposited. In fact, melanin makes the skin stronger, which is beneficial to the endurance of the penis. Black penises satisfy experienced women, and there must be a reason for that!
But isn't there a more convenient way to make your penis darker instead of doing it more often? I suggest you give your penis a "sunbath". In addition to going to the beach or the mountains, when the weather is good, you can take off your pants and sun-dry your penis on the roof where no one can see you. Just like sunbathing at the beach, melanin will be deposited on the skin of the penis, creating a dark and lean penis.
However, do not stay in the sun for too long at a time to avoid dermatitis due to sunlight incompatibility. This isn't like your back or arms, where inflammation can be a problem.
In addition, ultraviolet rays can easily cause skin cancer. To avoid sunburn, you can use skin care products such as sunscreen and sunscreen lotion. It's like climbing stairs. You can't be impatient and you have to practice slowly.