The 17-year-old boy is in the adolescent development period, there is a sexual demand masturbation (jerking off) is normal. The impact of two days on the body varies from person to person and cannot be generalized. The actual fact is that you can find a lot of people who are not able to get a good deal on a lot of things. The actual fact is that you can find a lot of people who are not able to get a lot of money from the internet. It will not affect the next erection, will not cause uncomfortable symptoms in the reproductive system, will not affect normal life and social life, and will not result in guilt, guilt and other psychological pressure. As long as the above four points are achieved, once every two days or other frequencies will not be a problem, otherwise it is necessary to reduce or quit masturbation. Once the body does not feel well, it is advisable to go to a regular hospital for male medical examination to clarify the cause.