After my vasectomy my naculars were extremely swollen.
While climbing a tree I slipped and fell hitting my naculars on a branch.
That baseball hit that poor guy in the naculars.
My naculars sure hang low when I have the flu.
It is said of the situation where a person has the bad luck to make contact with his testicles against an undefined surface or object, intentioned or not.
Given the nature of the word, it is more appropriate to design cases where the interaction is made with a moving object, for example, a ball.
Although it is extremely painful for the victim, it tends to be considerably funny to people who witness it.
Today in the baseball game the pitcher took a nutshot; the baseball hit him in the nuts.
Man, I just watched the funniest nutshot video ever.