Effectively a blockage that happens inside the testis, causes a varying degree of pain depending on the severity of the cramp and the individual. Not all males have sperm cramps, it must be stated that some men also do not know what it feels like going under a sperm cramp.
When I started to hit puberty I remember waking up painfully due to a harsh pain in my groin acting up, I learned it was a spermcramp.
When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.