There were two men on safari - one reading and the other, writing. A lion, quietly stalking them, attacked and ate the man who was reading, but left alone the man who was writing, because knew readers digest and writers cramp.
@sspec No you're not. I guess these days, it would likely be called "typer's cramp," but I've never heard of anyone getting it. When one writes (as with a pen on paper) for a very long time, the writing hand can cramp. That's all it means.