Disclaimer: The following is NOT my usual "I've tried it and it's good" review -- it's not a review at all. I have never used the Blowguard or seen it (except in Web photos). I am NOT promoting this product and have no idea if it's good, or if anyone needs it in the first place, or even if it's for real. So why am I writing about it? If I don't, who will?
Fellatio without teeth. I know, if that's one of your sex acts of choice, you've had decades of experience learning how NOT to use your teeth while giving a man the pleasures of oral sex. But pretend for a moment that you haven't learned how to control your dental attributes (or you've been watching True Blood on HBO before sex), and your guy scoots into a corner of the bed and hides under the covers when your mouth approaches his nether regions. The Blowguard, apparently, was invented to address the problem of enamel (or fangs) meeting penis. It also holds dentures in place during oral sex play, if you read the website carefully.
Now here's the scary part: The Blowguard has a mini-vibrator in it. That may appeal to the fellatio recipient, but I can't imagine it would feel good (or safe) to the giver who now has a mouthful of vibrating plastic. If you've tried this product, I hope you'll leave a comment. (No advertising, just user comments, please.)
I'd love to hear from you with your tales of teeth + penis, if this is indeed a big problem out there. I'd also like your suggestions for more weird sex devices to tell all of you about -- either odd devices that are available now, or some that ought to be invented... or not.