The male internal and external genitalia are used for reproduction and for pleasure. They look like this:

You have 5 internal sexual organs:

Vas deferens (spermatic duct)

 This is where the semen is transported from the epididymis to the urethra.

Seminal vesicles

They secrete a thick fluid that nourishes the semen.

Prostate

This organ swells and prevents urine from leaving the bladder during ejaculation.

Epididymis

This is where the spermatozoa complete their maturation.

Urethra

This is a tube that goes from the bladder to a small hole at the end of the penis, called the urinary meatus. Both urine and semen move through the urethra to exit your body.

You also have 2 external sexual organs:

Penis

This organ transports semen in the urethra. It has three parts: the body, the glans (head), and the prepuce (foreskin). The glans is the thicker part at the end of your penis and the foreskin is the small bit of skin that covers and protects the glans.

Testicles

They produce and store millions of microscopic spermatozoa and a hormone called testosterone.

The penis and testicles are the best-known organs because they’re visible. But even if you can’t see them, the internal organs are just as important and play an essential role in reproduction.

Source: Le sexe et moi.