Everyone has their comfort level in terms of communicating with them. Each person's level is quite different from the other. What you may can handle, another may not. If you find yourself wondering why your 'certain' person will never hear you out, try adjusting your comfort level to theirs. Bring it down a peg or two. If what you need to say is THAT important and they keep shutting you down, perhaps you need the wisdom to know how to articulate what needs to be said. Remember, wise presentation precedes quality conversation.