that input(sensor) pin will sense current
No, it senses voltage.
and make a decision as to what it last "heard" on or off.
I don't even not what this is supposed to mean.
The LAST electron; was it a 0 or 1?
Electrons are not 1 or 0.
ELECTRONS. Static has electrons,
Static doesn't have electrons. An accumulation OR LACK of electrons on a surface causes a static electric field. Such accumulations are usually formed by different work function when two insulators are rubbed against each other.
our bodies give off electrons. So if you want it to read 0, then it must be tied to ground when no voltage is applied(pulled to ground).
You ARE applying a voltage - 0V to it, when you pull it to ground.
Otherwise it is a floating input and will continue reading/sensing any floating electrons that might happen to be near the input wire.
While you probably CAN charge it via static charge (you are basically filling a tiny capacitor), electrons that are floating around in the air are not the problem, but rather electromagnetic waves. The pin than functions as an antenna. So it is rather photons than electrons that cause anything here.
This is probably the worst explanation ever...
That might be possible. Most of it is wrong.