Have you ever had that strange realization that you have developed the super power to render people utterly unable to hear what you are saying?

You must have noticed that by some strange and spooky coincidence that some folk seem to go completely deaf around you.  Hello, is anybody there, you think, am I talking to myself?

You know the sort of thing, you ask them quite reasonably to do something for you or to NOT do something around you and it's like you don't exist.  What IS that?? 
 
Or maybe you have been gifted (or cursed?) by some passing super hero high on kryptonite who has made you and your needs completely invisible to others.  Ka-pow!- other people start railroading your views, lose the ability to ask your permission or take your needs on board.

You are the Invisible Woman/Man but without the added bonus of being able to rob banks or pull faces at the boss undetected.

Perhaps you feel like you're the only one who buys a drink at the bar, remembers birthdays or seems to be on hand as an unlicensed and unpaid taxi service.  Feeling powerless, ignored and downright fed up you've often wondered how "mug" or "dog's body" became your middle name.