A Simple Guide to Male Reproductive Anatomy

Think of this as a tiny anatomy lesson for a dude’s junk. Why? Because knowledge is good, understanding basic biology is important, and you never know who you’re going to impress by identifying where the frenulum is.

  • Penis. The male external sex organ responsible for delivering sperm. The largest one on record was 13.5 inches long and 6.25 inches in circumference. (We cannot read that without saying “ouch.”) That reminds us: A man of this girth might actually be too big for a comfortable male condom fit, but a female condom would be an option.
  • Glans. The very sensitive bulbous tip of the penis. In non-circumcised men, the foreskin mostly covers it. Slang terms: Knob. Helmut.
  • Urethra. A tube that runs through the penis to release urine and semen. Men and women both have urethras. In women it’s just a couple inches long. In men, it’s about eight inches long.
  • Frenulum. Where the foreskin attaches to the underside of the penis just below the glans. You can usually see where some of the frenulum remains even after circumcision. FYI: This spot is also known for being intensely sensitive.
  • Scrotum. The sack that contains the testicles, which are two ball-like glands that make sperm and hormones. Did you know that the larger a man’s testicles, the more sperm he’ll produce? Yep. It’s true.

One last thing: Should you come in contact with any of the body parts on this list—in a way that could lead to a pregnancy scare—may we suggest a super reliable form of birth control.


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In Search of the G-Spot


Magdalena J.
Past Member 2 years ago

Thank you!

Barb Hansen
Ba H2 years ago


Paul Meyer
Paul Meyer2 years ago

Like the cigarette advertisement of yore said, "It's not how long you make it, it's how you make it long".

Lone W.
Lone W2 years ago

Not a very good article. Actually, tthe size of the testicles is inversely associated with fertility. Among healthy men with testicular size within the normal range, those with smaller testicles are more fertile.

Also, what about the prostate and the seminal vesicles? THey contribute to the ejaculate? And not mentioning the brain is really a great mistake.

Jennifer H.
Jennifer H2 years ago

Great comments. Thanks for sharing...

Elena P.
Elena Poensgen2 years ago

Thank you :)

Ken W.
Ken W2 years ago


Muff-Anne York-Haley

I knew all the names except the Glans, I'm a female so I think that's pretty good!

BJ J2 years ago

Alrighty then. . .

Nils Anders Lunde
PlsNoMessage s2 years ago