3. Kinky Sex for Couples
The author of The Ultimate Guide to Kink, and The Secrets of Great G-Spot Orgasms and Female Ejaculation, Tristan Taormino is a critically acclaimed writer and movie maker. As a part of her sexual activism, she offers a sex class called Kinky Sex for Couples, a great way to spice things up in your bed. The class is free, so all you need is an open mind and a will to learn.

Svittlana/Shutterstock.com