If your dick feels too much teeth when you're getting a hummer, you might want to invest in the Blowguard. This is a horseshoe of silicone, designed to fit over the lower teeth, to protect delicate bits from the sharp edges therein. Not content with just that, the front edge of the Blowguard has a tiny vibrator inside, to add to the experience. I'm one of those guys who doesn't cum from a blowjob, but I do love going down on my gal, and the blowguard works well for her, too, at least according to this review. I haven't got one yet, but Gracie might have to splurge a little! (via)