For how how long does the penis grow.(Like Till What Age)
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How Long Does....
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It usally grows in five steps between 13 and 17 years of age
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most likely completely done by age 20, but it definately stops when you hit tanner five. whenever that is for you.
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Tanner Five...whats that?
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It varies enormously between different people. The average age it stops is perhaps around 16, but it can be anything from 12 to early twenties.If you start puberty later, you'll most likely finish later. But even the length of time you're in the growth spurt, or whether you grow fast or slow, varies a lot.