Here
is a quote from the video library, by Donald E. Greydanus,
MD
The
size of your penis is simply determined by factors, called
genetic traits, which you inherited from your parents. There
is nothing you can do to increase or decrease the size of
your penis -- it will develop into its adult size as you change
from a boy to a man through the process called puberty.
Most boys start the changes of puberty
between 10 and 14 years of age, though a few will start earlier
or later than these ages. First, the testicles (balls) begin
to enlarge and then hair starts to grow around the them. The
penis then starts to enlarge, first in length and then later
in thickness. Though there is much normal variation, the final
penis size is reached four to six years after the testicles
first started to enlarge.
This
process of normal penis growth can be disturbing to many males.
Since the testicles enlarge first (and later followed by growth
of the penis), many young male teens do not notice the testicles
growing and worry that they are not changing and that their
penis is too small. If you are overweight, fat tissue can
hide the penis somewhat and give an impression that the penis
is smaller than it really is. Some males in your class may
have started their changes of puberty well ahead of you and
they may seem like they have an adult-size penis-that can
be very upsetting!
It
is difficult to know how large a penis will be in its erect
state, simply by looking at it when not erect (or when flaccid).
It
is also true that adult penis size varies considerably from
person to person. Just as with any body part, different people
will have different penis sizes. We live in a society that
pushes a myth that the male with a larger penis has a better
sex life than one with a smaller penis. This is constantly
noted in sexual jokes, in comments heard on TV, or in the
movies and in many other places.
The truth is that normal
penises vary a lot in size, and sex is just as good
for all of these men. You sometimes need to wait a year or two
after your overall height has stopped changing to see what
final size your penis will be. If at any time during your
growth period, you are worried that your penis is abnormal, just
go to your doctor and ask him or her directly.
In almost every case you will be told that it is fine.
For 