A guy I know bought him a tig welder not long ago. He learned he could sit in a chair and weld because tig doesn't throw sparks down his shirt or in his lap. This fella got all cozy in his chair and when he went to strike an arc he then realized the ground clamp was laying in his lap. Don't know if it was a hole in his jeans or sweat but he took a shock to the uhhh ummm man parts. No it DOES NOT work like viagras nor does it cause any negative effects that he's noticed.