How to enlarge a penis size in a short time?

According to statistics, the average size of a member of the planet is only 15cm. But according to the latest polls of the female half of society, the psychological level of the length of the "normal" penis is not less than 17-18 cm and it turns out that half of the men do not fall under these norms. Given the urgency of the problem, many scientists and ordinary men searched for and developed a variety of methods to increase the penis. Let's get acquainted with the most basic and effective of them.