The scrotum or scrotal sac is a male reproductive structure located at the base of the penis that consists of a suspended dual-chambered sac of skin and smooth muscle.

A sex organ (or reproductive organ) is any part of an animal or plant that is involved in sexual reproduction.

Sexual arousal (also sexual excitement) describes the physiological and psychological responses in preparation for sexual intercourse or when exposed to sexual stimuli. A number of physiological responses occur in the body and mind as preparation…

Sexual intercourse or sex is a sexual activity typically involving the insertion and thrusting of the penis into the vagina for sexual pleasure, reproduction, or both. This is also known as vaginal intercourse or vaginal sex.

Sexual reproduction is a type of reproduction that involves a complex life cycle in which a sperm or egg cell combines with another to produce a cell that develops. Sexual reproduction is the most common life…