Obviously if you play with a guitar or a violin, you must to touch the strings on the instrument, but we don't really talk about this type of strings. The name of this artist is : Andrew Huang and if you don't guess he plays the famous music of Johann Sebastian Bach : " Air on the G string " with underwear for women, or men ? He plays simply with the tension of the elastic for the tunes, this is very impressive and funny ! 🙂