Testicles are the male sex glands in men who are also in animals. Men have two testicles are wrapped with scrotum. Previous research shows that the size of the testes which means having a good and healthy reproduction. But recently a new study found that men who had large testes size tend to be more susceptible to heart disease, high blood pressure, and also a heavy drinker. The researchers studied 2,809 men visiting sexual health clinics, and they record the size of the testicles and then test their hormone levels before analyzing the health of 1,395 men for seven years. The result, they found that men with large testicles size were more susceptible to heart disease than those who have smaller testes size. In addition they also found that the testes of the male owners have the level of luteinizing hormone (hormone controls production of testosterone) levels that affect testicular size and can interfere with the cardiovascular system. "Further research is needed to clarify the determinants and mechanisms of testicular enlargement that could mediate the increased risk of cardiovascular disease," concluded the researchers.