My oldest son is fascinating. He will go a couple months left-handed and then suddenly switch to being right-handed. He’s never aware when the flip takes place. I’ve seen it happen several times.
When he is left-handed, his right hand is awkward. And vice-versa.
He’s 34 years old and cannot tell you which hand his right and which hand is his left hand.
Ambidextrous.
The easy way to remember L or R is to make an L shape with your thumb and pointer finger. On the left side the L will be correct, and on the right hand it will be backwards. Maybe that trick can help him.
I’m left handed, I guess. I only eat and right left handed. I’m 68 and still don’t know right from left.