Nina Hartley's Guide To Multiple Orgasms 2004 | Adam & Eve | Runtime: 1h 36min | Series: Nina Hartley
Nina Hartley's Guide To Female Ejaculation 2005 | Adam & Eve | Runtime: 1h 24min | Series: Nina Hartley's Guide
Nina Hartley's Advanced Guide To Anal Sex For Men And Women 2007 | Adam & Eve | Runtime: 1h 43min | Series: Nina Hartley's Guide