Several of this show's stories were reworked from episodes of the British sitcom "Man About the House" (1973), including this episode, inspired by "The Last Picture Show" (1975).
Mr. Roper (Norman Fell) is reading an adult magazine named Playhouse, which is obviously a combination of Playboy Magazine and Penthouse Magazine.
When the Playhouse magazine is opened to the centerfold, a white page is used to cover up the photos on the backside of the page. At one point when the centerfold is refolded incorrectly the white page goes inside and the midriff and bellybutton of the centerfold can be seen.