Dog balls occurs when they get really hot and hang really, really low.

It can happen on a long car journey, for example, the drive from Biarritz to Lisbon over the Spanish plains, or perhaps, if you prefer, from Sydney up the Goldie.

What you need to do is stop the car, stand by a shady glen or cool meadow, grab your sack and spread it in the breeze using thumb and forefinger of both hands. If there is a cool morning offshore, or perhaps a refreshing afternoon sea breeze, stand to face it for a twenty count.

It’s a fact that a cool breeze is good for your sack, because your sack enjoys a cool breeze like, pretty much never.

Even better, if there is a cool, babbling brook, immerse the sack in its soothing, rushing waters.

In the absence of fresh breeze/babbling brook, blow on it.

On a long flight, the nutsack can heat up 11 degrees above the usual comfort zone and get really clammy.

If so, go to the toilet, take it out and blow on it, and while you’re at it, wipe your bum, even if you haven’t done a poo.