From Tuesday, Aug. 26: A live videoconferencing event produced by Sssh.com, the iconic husband and wife duo talked about Ernest Greene’s new novel “Master of O,” the recent appearance of BDSM on the pop culture radar and their careers in adult entertainment, each of which spans more than 30 years. Nina Hartley, who performed in her first adult film in 1984, is also well known for her work as a sex educator and author. In addition to performing in nearly 1,000 adult movies, Hartley has released a line of instructional videos, and in 2006 published the book “Nina Hartley’s Guide to Total Sex.”