Try this foolproof (i.e., puke-proof) move: Place the tip of your tongue on the roof of your mouth to block the back of your throat, says ob-gyn Draion Burch, DO. When you take him in, aim against the underside of your tongue. And use your hands (curl one around his shaft and use it as an extension of your mouth—just use plenty of saliva). That way, you’ll avoid any gagging while also giving him the feeling that you’re going deep. A great beej for him and avoiding a vom-dot-com situation for you? That’s a total win-win.