Thank you asking. I can understand your concern. Your problems are consistent with a case of premature ejaculation. There can be no particular cause for it, but stress, anxiety, are some important risk factors. Regular excercise increases body's capacity to handle stress. It in a way reduces stress. That is how it indirectly helps with premature ejaculation problem. Kindly continue exercising. The issue any get spontaneously relieved after few years. It may cause issues while intercourse. The sex can end very early as one reaches ejaculation quickly. The management would consist of medications if needed and techniques to prevent early ejaculation. Guided masturbation is one exercise that can help. However, for a comprehensive management plan and suggestions, a details history of habits, pattern of symptoms, associated risk factors, etc is needed. And therefore, a consultation to expert is adviced.