Original title: Playboy: Ultimate Sensual Massage Year: 1991 Genre: Training, Erotic Directed by: Adam Friedman Starring: Rebekka Armstrong, Kristina Devlin, Victoria House

Original title: Marilyn Chambers Guide To Anal Sex Year: 2007 Genre: Sex Guide Starring: Marilyn Chambers

Original title: Arousal, Foreplay Orgasm Year: 1994 Genre: Sex Guide, Erotic Directed by: Lawrence Lanoff Starring: Dixie Beck, Avalon Anders, Lori Jo Hendrix

Original title: Best Kept Sex Secrets Genre: Erotic, Sex Guide Directors: Lawrence Lanoff (as Lawrence Unger), Bob Kubilos, Ta-Na-Ses-Cu, Starring: Lori Jo Hendrix, Paula Aletonis, Amy Rochelle

Original title: Playboy's Sensual Pleasures of Oriental Massage Year: 1990 Genre: Sex education, Erotica

Tristan Taormino's Expert Guide To Advanced Anal Sex Genre: Sex Education Directed by: Tristan Taormino Starring: Nina Hartley, Kylie Ireland, Adrianna Nicole

Original title: Modern Loving 2 Genre: Instructional Directed by: Ben Schaffer Starring: Paul Richard Tierney, Catherine Emily Wiltshire, Phillip Cordell, Tracy Cordell, Anthony Buonis

Nina Hartley's Guide to Swinging Year: 1995 Genre: Instructional Directed by: Nina Hartley Starring: Nina Hartley, Anna Malle, Hank Armstrong, Christi Lake, Dallas, Dic Tracy

Original title: Nina Hartley's Guide To A Better Cunnilingus Genre: Instructional Directed by: Nina Hartley Starring: Nina Hartley, Angella Faith, Moose

Pure Nude Yoga - Twilight Garden Goddess Year: 2015 Genre: Training, Erotica Directed by: Dane Van Rose Starring: Olivia North