The Paradox of the Free Electron is that it has a negative charge and a positive effect.
It is both positive & negative depending on my perspective.
It has a beneficial effect on the molecules that are my physical body when it neutralises the positive charge of free radical activity in my cells.
Free electrons are free.
They may be seen to have no charge, but in fact they have a negative charge at no cost to my Self.
Electrons are freely available to flow from Earth to me.
When I walk barefoot on the ground, I ground my Self and discharge my positively useless static by charging with negative electrons.
Positive static is free but radical and seldom beneficial.