Sexual Anatomy Inside Out - Scrotum and Testicles

Male Sexual Anatomy Images

Most boys are born with a penis, testicles, and a scrotum.  

The scrotum is the loose pouch of skin containing the testicles (or “balls”).  

The primary function of the scrotum is to protect the testicles, which are very sensitive to pain, and also need to keep an even body temperature to function properly.  The scrotum acts as a sort of insulator/cooler, keeping the testicles close to the body when it’s cold outside and letting them hang out loosely, further from the body, when it’s hot.

  The whole question of growers and showers are tied to the function of the scrotum which can restrict and contract, sometimes to a remarkable degree.


The testicles serve two main functions: producing sperm and producing testosterone. 

For the sperm to work there needs to be an even temperature. The scrotum helps with this by either keeping the testicles tight against the body when it’s cold (the famous “shrinkage” effect when you get out of the water) or hanging loose in hot weather.

Inside the testicles, the epidymis is a coiled tube where sperm mature until they travel through the vans deferens before they are ejaculated during ejaculation.

There is a great difference in the size and look of testicles from one man to another. Most (but not all) men have two testicles; it is not uncommon for one to hang lower than the other.

Both the scrotum and testicles can be part of sex play and sexual pleasure.

A lot of men enjoy gentle (or firm) stimulation of the testicles, which can involve licking, tugging, or simply cradling the scrotum.


More Than Just for Reproduction!

People talk about these body parts as being primarily for reproduction.  But the truth is that those of us with these parts (and those of us who have sex with people who have them) actually engage with the scrotum and testicles way more often for a reason that has nothing to do with making babies:  they feel good!

The scrotum in particular is very sensitive to touch.  A gentle caress, tapping on it with the pads of your fingers, blowing on it, all of these gentle forms of stimulation can produce very pleasurable sensations.  

There is an entire form of sex play referred to as CBT (not to be confused with cognitive behavioral therapy) which falls under the category of BDSM and includes much more intense stimulation.

It’s not for everyone, and there are key safety concerns to be aware of, but people who like it, seem to like it a lot!