Friend! You may be fatter than others. So, it looks like your penis is very short! Because the penis has an external part and an internal part! Therefore, the length of penis depends on erection! The normal range of penis length is 12- 15cm, and the shortest is 10cm for boys. At the age of 20, the growth rate of penis begins to slow down, and it basically stops at the age of 25, and the growth rate of penis will not exceed 1cm between the ages of 20 and 25. If you think your penis is short, want to grow it! Don't use drugs to prolong it. Drug extension is basically a lie! There are two kinds of drug delays! One is hormones! Hold it for a few hours! This is harmful to your health! The other is colloidal injection! For the elderly, it can last for 7 days to half a month, but it will lead to sexual dysfunction! ! Don't do massage, useless massage is not much different from masturbation, if masturbation will affect the growth of penis during development! If you pass the developmental period, don't use any physical therapy or drugs to prolong it, because you think about it, can people grow taller after puberty? I can't! So, the growth of penis is the same, except. There is no other way to operate! Moreover, there are many false advertisements now. Be careful! Recommend penis lengthening! There is a way to extend the operation by itself! It's called "Long's penis plasty", which is relatively safe!