I am 15 and my penis is 4cm in length .... can I make it longer?

  Hi!I'm Cristina and yeah I'm a girl and only 14 so what?My big brother is a doctor and my younger brother is 16 and he has a 1 inch penis *giggles*me and my family are very close so we talk about personal stuff a lot!I showed my big brother ur question and he said that it would be normal is u had a 4-7 inch penis when your only 15 but a 4 inch penis is 2 small for your age.he says you can wait a little bit longer and see if it has gained size but if it doesn't gain size you should consult your parents or your doctor about this and If your too shy or emberaced to tell someone you can write me a message at my bro's email

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 or just write questions here and maybe I might be able to help u or my bro might be able to help u!hope it helped!

: ) xoxo