Greenmonsters
Wannabe Duck Boat Owner
That is absolutely, positively, 100% true.
I had a 9yo once that couldn't get his head centered over a bent back knee.
I kept saying, "Get your head over your knee." And, he just couldn't do it right. After showing him several things, I accidentally said, "Get your knee under your head." And, that phrase clicked and he did it right.
His Dad and I looked at each other like "What the heck? What's the difference?" Whatever, the kid got it right.
I often have to use 5 or 10 different phrases, before one clicks, and as you said, what works for one doesn't work for another.
And often the vocabulary is completely different depending on whether your working with boys or girls!