Nodding the right way

This might sound a little bizarre, a little trivial and a little too boring,
But I have some strange intrinsic issue with basic nodding,

And by nodding I really do mean the basic up-n-down head bobbing,
Something that’s synonymous with saying yes, and agreeing what the other person is mouthing,

To convey silently that I understand and I agree,
Instead of nodding, I shake my head confusing my peers, lecturers, tutors and people sundry.

The big question is why I do it, why do I shake when I am supposed to do the opposite
Saying yes by nodding is one of the first things you learn as a child, isn’t it?

Searching for a sensible answer meant thinking back to when I first started doing it,
But all the racking and recollecting has confirmed its always been a habit.

Its begun to worry me now as to how many people I’ve given the wrong signal, how many people I have unknowingly spite,
The other day, my new tutor said he’s seldom been so discomfited in his plain sight,

Though I am consciously now trying to nod the right way, correcting myself again and again,
The bloody thing is so badly hard-wired into me, getting rid of it is a bit of a pain.

Is this because as a child, subconsciously I was always a rebel, I always liked saying no,
Or maybe this shaking is just an exaggeration of a slight sideways tilt of obedient yessing, how do I know?

Hell, I am giving this too much importance,
Still, it was fun alright writing what could be a single line of real nagging concern into a quick verse.