The penis is a male reproductive organ involved in both sexual intercourse and urination. It typically consists of three main parts: the root, the shaft, and the glans. The root is the base of the penis, attached internally to the pelvic bones. The shaft is the main cylindrical portion that extends from the root to the glans, while the glans is the rounded, sensitive tip of the penis.
The penis is made up of spongy tissues that become engorged with blood during sexual arousal, causing an erection. This allows for the penetration of the vagina during sexual intercourse, facilitating the transfer of semen containing sperm into the female reproductive tract.
Apart from its reproductive function, the penis also plays a role in urination. Urine is expelled from the body through the urethra, a tube that runs along the shaft of the penis. During urination, the muscles surrounding the urethra relax to allow for the flow of urine.
It's worth noting that the penis, like other body parts, comes in various sizes, shapes, and colors.