There is no relationship between overall size and penis size. A skinny guy may have an average size penis but since it is on a smaller body, it may appear larger than it really is.
There is no specific growth rate for the penis
Any size will do. The average male has a penis 5' long with a OD circumference of 2' . The hymen is smaller and can be ruptured with a finger.
So what if you do? Are you asking if that is a normal size or are you bragging? The average length of a guy's penis is between 6 and 7 inches when erect so if you have a 7 inch penis at 17 you have nothing to worry about.
It isn't the size of the penis that determines the satisfaction of your partner. It is how you use what you are equipped with.
The size of a guy's penis when flaccid is not a good indicator of the erect size. Even a penis that looks small when flaccid, can grow to be of very respectable size when erect. Conversely, men who have a penis that looks large when flaccid, generally don't see very much change in actual size when erect.
The average size of any penis AFTER PUBERTY is anywhere between 4 to 9 inches. This size however varies with races. In general, for example, Blacks have larger penises compared to Asians. If you are 15 and still going through puberty, then don't think about your penis size now. Wait till after puberty.
The average size of an erect penis is about 6 inches, or 15 centimeters. Average means then that some are bigger then 6", and some are smaller. It might be embarrassing sometimes to have a short penis, but it shouldn't prevent you enjoying sex and orgasms any less. As someone said "It isn't the size that matters, it's what you do with it!" The average penis size is 5-6 inches. No, having a 3 inch penis is not bad. It doesn't affect you physically in any manner. And it depends on your age. If you haven't begun puberty yet, then that is a normal size. * http://wiki.answers.com/Q/What_is_the_average_size_of_a_penis
The normal size for a penis is about 5-6inches but it is said when a guy gets a boner their penis increases about 2 inches, so if u do it with a guy who has a size of 6inches when he gets a boner it will be 8 inches.
That it was in his genes to have that size. It is not related to penis size as some think. That is a myth along with hand size etc.
Average 15-16 inches. That is the average size for a body builder, average "normal guy" size is 10-12 inches.