Door knobs

Rubbing on door knobs are amazing. My teenage brother has a door knob that sends an electric shock through your hand if you tried to hold down on it too much. It's used to keep me and our parents out of his dungeon room. I hated it at first but now... I love it. When my bro is out, I get naked and start by grinding my clit on it and then only when I get close to orgasm, I put my whole body weight on the knob and the tiny shock sends double the waves of pleasure through me. It's amazing. Sometimes I leave it wet for my brother to see. I even winked at him once when I saw him wipe his hands on his jeans when he came down the hallway! I wonder if he'd ever double the shock and how would it feel in me if he did...