# Poynting vector and electric shock

As an explanation to Poynting vector(P), I read the following example:

A DC source is connected to a bulb (receiver) by means of 2 conductors. The direction of the electric field between the conductors is given to be from the conductor at higher potential to the one at the lower(return line) and the $\vec{H}$ field in the dielectric (air) around the conductors along with this $\vec{E}$ field is shown to result in a $\vec{P}$ which has a small component perpendicular and towards the conductors and a large component parallel to the conductors directed towards the receiver.

The text goes on to say that this proves that the energy in electric circuits is supplied to receivers via the dielectric surrounding the wires and not the wires themselves.

If that is the case why don't we feel the energy transfer when we are around or touch an insulated conductor and the shock is felt only when we touch an un-insulated conductor.