This is not a topic I ever expected to cover. I was led to it by Diana Huff, a Facebook friend (and mutual admirer of David Meerman Scott). Her client Helaine Smith has written an ebook on the topic. Here's the link to the book. It is short and informative and worth a look -- and, yes, actually goes beyond sex to discuss several areas of oral health.
I mention it also because this is a great example of social media viral marketing, of the type often discussed by David. And, here I am, both telling you about it and participating in it by promoting not only the book, but also linking several types of social media in the course of doing so.
(Disclosure: I have no financial relationship with any of the people mentioned and make no warranties about the material contained in the ebook. I do hope, however, that some of my colleagues with chronic bad breath will read that section of the book.)