I hear how ashamed you are over what you believe is your abnormally small penis. I want you to know that many men have very short unerect penises, and these are the penises which grow disproportionately when they become erect. Yours grows an entire 2. 7 inches, which is an enormous size increase. Men who have large unerect penises hardly grow at all when they become erect.
I also want you to know that a 4. 7 inch erect penis is within the normal size range. The boys that tease you obviously are ignorant of the facts. If you can believe what I am telling you, and feel better about yourself, you will find that people will tease you less. (People are teasing you because they sense that it gets under your skin--and yes, that includes your foreskin. ) If you are worried that you are too small to give women pleasure, let me assure you that your size will not be a problem.
First of all, the average vagina is only about four inches in length, so your 4. 7 inches are more than adequate to fill the space. Also, women only have nerve endings in the lower third of the vagina, which means that even if your penis were shorter than it is, it would still reach the sensitive spots in a woman. If you have read any sex surveys, you will find that women say again and again that size doesn't count (men think it does, but women don't agree. ) What arouses women most is good foreplay, kissing touching, etc. , and obviously, good foreplay has nothing to do with penis size. The saying, it's not the size of the wave, it's the motion of the ocean, applies here. Besides, there is nothing wrong with the size of your wave.
I also want you to know that at 17 you may not have finished growing. Some males don't finish until the age of 19. You could visit an endocrinologist and have him or her check out your hormone production to make sure that you are secreting all the testosterone and androgens that you need to complete your development. Even if it turns out that your hormones are normal and you are finished growing, remember, you are still fine the way you are. And, in answer to your question, how you can make it bigger and better, I can only tell you this: A penis enlargement operation, while available, is not something I would not advise. In many cases, the operation leaves men disfigured and with dimished sensation. In short, messed up.
So, accept your penis the way it is, perfect your foreplay skills, and go out and make a girl wild with pleasure. When you know that you are a sex muffin, you will walk like a peacock and no one will tease you anymore. Let me know how this matter resolves. Lots of luck, 'normal, not teenie, peenie. '