A few days ago i was masturbating, and after a while i felt a semi acute pain from my testicle. the pain quickly subsided to a dull pain before going away. i inspected the testicle and found the pain to be coming from, or came from the area where the testicle attaches to the (sperm chord?). two days later it seemed to be gone, so i re-enacted the setting it started in and the same result, just slightly more annoying. any idea what could be going on?