Nor click my fingers while the cat’s eye blinks

A nod is  good for I can never wink
Nor click my fingers while the cat’s eye blinks
I do not read between the lines as yet
But I can read a face and place a bet

Do you find it hard to signal love?
Does your lover wear a rubber glove?
Non-verbal signals are a tiresome pest
In mathematics, we avoid them in our tests

If you speak to me , be plain I beg
So far, I never got to work on eggs.
I need exact instructions as I fear
Being belted  hard for making Father swear

I ask only that you respect my core
And enter my world only by the door.