Sometimes I feel pain in my testicles. Intermittent twinges in the testicles are common and these sometimes happen after the intercourse. If it lasts less than a minute then there is nothing to worry. An infection or inflammation causes testicular pain that builds up gradually. In such cases consult your doctor.
Ejaculation happens to fast.
Again, it is one of the more frequent problems. It is the muscle that you use to stop urine flow or to rid yourself of the last few drops. It is the same muscle that contracts for ejaculation, therefore strengthening it will give you more control during sex.