After ejaculation's testicles hurt. If the pain goes away in a day, it won't be a problem. He may touch the scrotum during ejaculation. At that time, because his attention was focused on sex, he didn't pay attention. After that, sexual excitement subsided. The rest will come out, and you will feel a little pain in your testicles. It's normal that your penis hurts a little. It will be all right in a few hours. No problem. If it still hurts after 1 or 2 days, you should go to the hospital to check whether there are orchitis, orchitis, varicocele and other problems.