Muscle fatigue. During an erection, the entire male genital region receives a much greater blood flow than normal. As soon as ejaculation occurs, the hyperflow decreases, the seminal vesicles relax, the region receives the normal amount of blood again and the person does not feel pain. If she does not ejaculate, the hyperflow does not cease and all the musculature in the region remains tense, full of blood. That is, if you leave your friend standing and don’t put him to work, he continues hard until he can’t take it anymore and, therefore, he gets tired. It’s like if you have a very prolonged sexual intercourse and you are able to hold the ejaculation for a long time – after several minutes holding the erection, you would also feel pain, but you would relax after ejaculating. To end the flood of blood and relax the muscles, the man can masturbate and deceive his organism, pretending he had sex. If the pain continues even after you «relieve», it is good to see a doctor, because pain in the testicles (which doctors call chronic orchialgia) can mean more serious problems such as varicocele (varicose veins in the testicles) or epididymitis (inflammation of the epididymis , where sperm mature).
