Our son must have been born with the gene that teaches him how to negotiate. And yes, before you ask - he always wins. Always.
There is no item too small or too big for him. Snack, bedtime, clothes, bath. You name it and somehow some way there always seems to be some sort of negotiation to get him to do what we want. We hear a lot of "one more minute" or "one more please." (Yes, our son has manors - that is actually one place where we are non-negotiable and he has excelled). It is not every waking minute of every single day, but it sure feels that way. The majority of the time it is because he wants to play longer or do something with mommy and daddy. He does not want to feel like he is missing the action.
There are certain places that we will not budge and the negotiations quickly breakdown into discord. But we are prepared for these moments and have a very good idea of what issues will trigger them. A simple distraction like pointing to a new toy or suggesting a new activity and all is right in the world.
I never thought that I would negotiate more with my 2.5 year old than I would in my professional life. And to be honest, he is far better at it than many colleagues that I come across. Then again, he is just beginning to understand the concept of consequences so he still does not realize there are any. So he can negotiate with reckless abandon and believes he has nothing to lose.
He has many years to hone his technique which can only make him more dangerous. I am both proud and scared at the same time.