If a 17-year-old boy does not have a morning erection in the morning, if there are no other uncomfortable symptoms, most of them are also normal. Most of the 17-year-old boys are still in puberty, this age the body androgen secretion is strong. It is a normal physiological phenomenon to have a morning erection, and it may be normal to have no morning erection at all. Because there are many factors that affect the morning erection, such as staying up late and frequent masturbation, frequent exposure to pornographic videos, graphic stimulation, resulting in the genitourinary system of congestion, swelling, etc. may affect the morning erection. The 17-year-old boy does not have a morning erection, if the sexual stimulation can be normal erection, no other uncomfortable symptoms, is also a normal physiological phenomenon. You can’t change your habits, exercise more, avoid masturbation, go to bed early and get up early, and live a regular diet.