In TV Show "Elementary" - Season 2 - Chapter 15, Dr Watson starts saying:
More on point than a sock
What is the meaning of this expression? What is the relationships with "points" and "socks"?
Context:
It’s an average morning at the brownstone, which means Sherlock has an entirely consensual, entirely independent ladyfriend over and has politely informed Joan of this fact via post-it, which Joan considers more “on point” than a sock on the handle. (It’s a ballet pun, like the title. The writers are having fun this episode.) After politely offering their guest coffee, Joan and Sherlock are called to a murder investigation– Nell Solange, a ballet dancer, was cut in two by a wire in the theater rafters.