It is responsible to protect the testicles. It contains many nerve and blood vessels. The scrotum acts like climate control, for the testes. When there is warmer weather the scrotum will pull back to the body, and away from the body during cooler weather. The testes must be in cooler temperature than the rest of your body, for sperm development. If the testes are the same temperature than the rest of the body for to long, infertility can take place. The scrotum makes the left testicle hang lower than the right, in case of impact. Hydrocele is fluid accumulation around the sac. It is very common in babies, though men of all ages can come across it also. It causes no harm to the testicles, and is usually painless. After the scrotum, the testes are one of the most important parts of the male reproductive