I'm a medical student, 5 , 11' tall , i have a small penis , but normal size testicles , having man boobs , please tell me the reason for those condition?

How does it WORK?: If you're in medical school, you already know that most true gynecomastia is idiopathic -- we never find the cause, and you have a duty to yourself and everybody else to get it operated, now. If you're overweight, liposuction. Penis size is inexplicable; average is 5.3" or so, if you've got 3.0 inches or more, you can satisfy most folks, smaller ones get harder and have some other advantages.