Metals are generally good conductors of electricity, which is why they are used in wiring, but power pylons are designed with ceramic insulators to prevent electrical shock. The zapping sensation from a trick stapler is due to static electricity, which is low in energy and generated by friction, not a significant electrical current. While all metals conduct electricity to some extent, their conductivity varies, with some being classified as poor conductors compared to others. Semiconductors also play a role in electrical conductivity, bridging the gap between conductors and insulators. Understanding the context of electrical flow and energy levels is crucial in these discussions.