Nina Hartley's Guide To Multiple Orgasms 2004 | Adam & Eve | Runtime: 1h 36min | Series: Nina Hartley
Nina Hartley's Guide To Simultaneous Orgasms 2009 | Adam & Eve | Runtime: 1h 15min | Series: Nina Hartley's Guide
Nina Hartley's Guide To Strap-On Sex 2005 | Adam & Eve | Runtime: 1h 28min | Series: Nina Hartley's Guide