I am post vasectomy for about 10 years now. I was wondering if there are any similar experiences. Specifically, (or at least I think something has changed), my testicles don't hang like they used to. They are always up and tight to my body. Kinda' like right after a swim in cold water. I once heard that the male body eventually builds antibodies against the sperm. As I understand, the temperature of testicles is regulated by the distance to the body and should be lower than normal body temperature for optimum sperm production. Any ideas?