By DJSparky - Own work, CC BY-SA 3.0, Link
"My left or your left?" marks the beginning of a confusion potentially without end.
We counter with conventions. "Stage left" means to the left when looking from (not at) the stage. "House left" is "stage right".
"Righty tighty, lefty loosey" defines the what we might call "cork screwing" -- a vector cross-product.
