The 14-year-old is still in the adolescent development period, genitalia are not fully developed, occasionally jerking off twice is not a big problem, but do not form a long-term habit, so as not to affect the body. It is generally advisable to jerk off no more than once a week. The most important thing is that you will be able to get the most out of your life. Therefore, it is recommended that adolescent boys focus more on their studies, take part in physical exercise to enhance their physical fitness, and try to look less at publications and videos related to sexual content to reduce sexual stimulation, and also to avoid frequent masturbation by developing their own hobbies and diverting their attention appropriately.