The temperature in the scrotum is a degree or two lower than the usual body temperature of 98.6 degrees Fahrenheit. The testicles need this lower temperature in order to carry out their job of producing viable sperm. If the testicles are kept at body temperature or higher for a prolonged period, infertility or sterility can result. The scrotum continually monitors the environment for temperature changes and responds automatically in the way that is best for the production of healthy sperm. A male's scrotum is very sensitive to touch and can be a source of sensual pleasure.
Some men enjoy having their scrotum stroked and fondled during sexual activity with their partner.
A gentle massaging of the scrotum from underneath, cupping the testicles in the palm of the hand, is often sensually pleasing to a male. Some men report that they have learned to delay an impending ejaculation, thereby prolonging sexual play, by firmly but gently pulling down on their testicles. This is one technique used in tantric intercourse to prolong the sexual experience.