Freshman yr of College I had severe pain in my left nut, beared with the pain for a few days until I finally went to the doctor. They first had a regular doctor check me and he asked if I'm sexually active and that I should cut down on (Jerking off, and he literally made te hand gesture) and I was like umm I dont think that is the cause. So he prescibed me some pain killers and Cypro thinking I had an STD (the asshole of a doctor) and then scheduled an appt with a Urologist the followed week. Since then I have been diagnosed with Varicocele Veins on my testicle, mainly left nut. I was sent to sperm banks to jack into a cup (to see how the veins are affecting sperm production and movement). Did that twice (believe me nothing like the Sperm Banks in the movies). Even had a Ulrasound on my nuts performed to check if it was anything more serious. ...That was interesting....Was told to put on a robe and only a robe and this female doctor was putting that lube-like gel for Ultrasound on my nuts, before all that she told me in a strict tone(dont let me see your penis, hold it at all times. LOL