Visit www.pegym.com You will know more about stretching exercises and kegel exercises. Length or the organ is given unnecessary importance. In reality, vagina is senitive upto 2 inches only. So ertct penis of two inches can also satisy a woman. Importnce of strength of erection and how much time it can sustain its erection. Stretching exercises can almost take 3 to 6 months for sibnifican incerase in length. It is also true that stretching can damabe peinis as suggested by the above poster.
I would not advise doing any kind of penis stretching. You can cause permanent damage to your organ this way, which would be way worse than feeling like you are a bit on the small side. Chances are, you are normal and will please your partner perfectly with the size you are. :)