Hi! I am 15 and I am getting taller, but my penis is not getting bigger. Why is it not growing like the other guys my age?
Every guy at the age of 15 is not at the same stage of development. Different boys will start puberty at a different age. Some will reach puberty as early as 9 years old; others won't begin until they are nearly 16 years old. It might seem like a wide difference, but it is the normal variation in humans. Therefore, you and a friend might both be 15, but you started puberty several years after your friend, then you won't have all the changes he has at the moment.