Sub one is a thrilling new experience in masturbation with a tapping technology that you can use with or without an erection. The flexible wings engulf your shaft in textured. soft silicone while the tapping pad on the base sends deep pulses of sensation to your shaft. Tease your frenulum or engulf your shaft. edging yourself to a crashing climax. Sub One allows you to enjoy thrilling sensations without having to thrust (unless you want to!)