Yes, it's probably important for women to understand how testicles work. Partly so they not inadvertently injure their male associates, but also so they can injure them when appropriate, to make up for the supposed higher average muscle mass and such, and know how to do it. It doesn't matter if the opponent is taller and stronger (and wearing more practical clothing), if he has an "off" switch.
A friend told me about how the weather and seasons were weird one year but one of her male rabbits was trying to mount a female, and she was out of season, wasn't into it, and she immediately went for his ball sack and bit off one of his testicles. She had to rush him to the vet, and he almost bled to death. It makes me think that external genitalia (testicles) are Mother Nature's trick for disabling the extra muscles and size that males have (just to impress/frighten other males, mainly).
A couple of fun facts that every woman should know is that castration is fatal from shock and blood loss in 50% of cases. Another is that a well-aimed kick, punch, or grab to the scrotum will take a guy out potentially for a half hour, long enough to get out of the building and hail a taxi. Move over Captain Kirk and phasers set on stun.