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With our patented Real Feel Super Skin® masturbation sleeve and a specially designed inner canal texture the STU provides the most intense and pleasurable training experience possible. When you masturbate using the Fleshlight STU, not only will you be improving your sexual stamina and techniques, you'll experience the intense orgasms that can only be achieved by using Fleshlight sex toys for men. If you can last 10 minutes in the STU, you can last 20 minutes in bed with anyone.