Didjya ever hear the ribald song/chant Do Your Balls Hang Low?
Adolescent boys loved it and modified it for parental consumption by switching in “ears” for “balls”, which is even more absurd and therefore the cause of gales of giggles.
Here’s the version I recall from my misspent youth:
Do your balls hang low
Do they wobble to and fro
Can you tie ’em in a knot
Can you tie ’em in a bow
Can you throw ’em over your shoulder
Like a Continental soldier
Do your ballsssss hanggggg lowwww
So I was reminded of this delightful ditty when I ran across several GIFs featuring big swinging balls,
Those with backgrounds in animal husbandry know that bulls’ balls are justly famous for being swingable,
and female tourists appear to delight in having their pictures taken with the balls of the Wall Street Charging Bull sculpture,
And if the subject of “why do balls hang like that?” interests you beyond the simple summary that its for temperature regulation to maximize sperm quantity and effectiveness in mammals with hangers, go read this.