I have recently been experiencing an uncomfortable situation during sex or masturbation. When I'm very hard my testicles climb all the way up, almost out of the scrotum and toward the base of my penis. I know it's common for the nuts to climb and for the sac to shrink during sex but in my case it is now extreme. It even hurts me quite a bit to the point that I have to stop and kind of push my balls back down. Could this be an incipient hernia? Any comments or advice?