The male reproductive organs, located in the scrotum hanging beneath the penis.
They are responsible for the production of sperm, which are transported via semen to the uterus of a female, at which point they are used to impregnate her. The testicles are also a major male erogenous zone.
Technically, it is actually the scrotum surrounding the testicles which is visible in most cases. A true view of the testicles would require a cross-section.
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