television static electricity

I always wondered why my arm hairs stood up when I rubbed my arm against a TV. Now because of physics I know that it is because of static electricity. I wanted to experiment a little with the static electricity of the TV and a piece of foil. If i bring the two object near each other initially there is not attraction. This is because both objects are neutral. However, if i turn on the television, somehow electrons are lost or added making thee TV charged. The charge of the TV is what makes your arm hairs stand up. Now if i bring the piece of foil near the TV it is attracted to it and the foil temporarily sticks to the TV. When the two object touch the TV gives off some of it electrons to the foil by charge by contact making the initially neutral foil negatively charged. Because foil is a conductor the electrons immediately spread throughout the foil. Now both objects are negatively charged so they are no longer attracted and the foil falls off. If i were to ground the TV by rubbing my arm against it before moving the foil near there will be no attraction between the foil and TV. That is because by rubbing my arm against the TV my body takes in all excess electrons and transfers them to the ground making the TV neutral once again.