Speaker Vibrations

You will need a large speaker with at least a 12-inch sub-woofer around 100 watts. Now take the cover off the speaker and place your dick up against the sub-woofer and play a song really loud with lots of bass. The speaker will vibrate your dick and tease you with every beat. You should have something over your dick, like a plastic bag or a condom, so you don't spray your speaker. Good luck!