The first thing you do is learn controlling your breathing. Google abdominal breathing and practice 10 minutes twice a day. when ever you want to control sexual urge take a deep abdominal breathing. 4 or 5 breaths will take care of your quick response.Breath controls your body and mind. So if you control your breath you will control your urge. Slow breathing will allow you to do intercourse with erect genital.Also learn some groin exercises. This will circulate blood around groin area to strengthen. Wish you best of luck.
A senior member suggests Arginine. Please Google this word and may take it. Arginine is a protein and quite useful. Investigate further this product.You can also googe male deer exercise and kegel exercise.
Ok I will try groin exercise. But any medicine s suggested to control sperm