What does it mean for a guys Balls to drop?

When a boy goes through puberty, his testicles (often referred to as "balls") descend from the abdominal cavity into the scrotum. This process, known as testicular descent, typically occurs between the ages of 6 and 14, although it can happen earlier or later.

The testes are initially formed inside the abdominal cavity during fetal development. They begin to descend into the scrotum during the seventh month of gestation, but may not reach their final position until after birth. In some cases, one or both testes may remain in the abdominal cavity or inguinal canal (the passageway through which the testes descend). This condition is known as undescended testes and may require medical treatment.

When the testes descend into the scrotum, they come into contact with the cooler temperature outside the body. This lower temperature is necessary for the production of sperm, which are the reproductive cells produced by the testes. The scrotum also provides protection for the testes, helping to keep them safe from injury.