The voltage at your house comes from a battery which is anywhere from a few thousand to 20,000 feet away at the central office. Due to several hundred ohms of resistance, it will not drive enough amps through even a dead short to hurt you, and your body resistance is usually quite high.
As a comparison, in a dry winter , you may have experienced a spark from your finger when touching a doorknob,, etc. The charge on your body generally exceeds 20,000 volts, hence the arc, but resistance limits the current to an amount which is not harmful.