Nobody in the porn business can talk about sex and sexual subjects with as much authority and depth as Nina Hartley, and in this guide to sex toys, she again doesn't disappoint.

Hartley opens with a discussion of the different types of toys -- penetrative, vibrating, tactile (a silicone sheet for jerking off), sensory-depriving (blindfolds) and constrictive (cock rings) -- then proceeds to have her three couples demonstrate several of them.

The camera spends most of its time on the Angelica Sin/Rich Handsome pairing, and considering her reactions to his labia licking and her later cowgirl squatting, it's time well spent. Hartley occasionally leans in with a few words of sexual advice, which will tend to disrupt attempts at masturbation -- but think how much viewers will learn!

Almost as hot is the Inari Vachs/Ian Daniels love-fest, with the brunette cutie enjoying everything Daniels does for her. Then, for the fantasy-deprived, the two join Hartley in a hot threeway at tape's end, where the toys are definitely a secondary consideration.