Quickshot Stamina Training Unit Lady & Butt. Practice makes perfect, especially in the bedroom. The Quickshot Stamina Training Unit combines two of our most popular products into a discreet, open-ended stroker engineered to turn ordinary masturbation into an intensely pleasurable training session. Just like its full-size counterpart, the Fleshlight Quickshot Stamina Training Unit was designed to replicate the intense sensations of intercourse, which can help users increase sexual stamina, improve performance and techniques, and heighten and intensify orgasms. Simply remove the dual end caps, lube up, and enter from either end for maximum enjoyment and minimal cleaning. With its open ends, the Quickshot Stamina Training Unit is the perfect tool for supplementing blow jobs or solo endurance-building sessions.