I can explain about the arrows "right-left" on the torpedo of the training machine.

I am the Left. At one time, I was re-taught to hold a spoon and pen with my right hand. Then everyone was re-taught, not at home - so in school. Something I can do with both hands, something only with the left, something only with the right. So, I think, so far, with the definition of left-right I have a lot of tension. It doesn’t work automatically, I have to think a few seconds first, and on the road it’s not always possible. Probably a lot like me.