The title spoofs that of the controversial Swedish movie "Jag är nyfiken - en film i gult" or I Am Curious (Yellow) (1967) that had the Swedish movie rating "yellow" that was equivalent to the USA rating of X. The Swedish movie was commonly known as "I am Curious - Yellow."
Michael Constantine (Mike Cooper) later played Sidney Kovac, another old friend of Lou's, in Boomerang (1981).
Michael Constantine (Mike Cooper) appeared in two television series featuring Mary Tyler Moore ("The Dick Van Dyke Show" and "The Mary Tyler Moore Show"), two television series featuring Ed Asner ("The Mary Tyler Moore Show" and "Lou Grant"), and two television shows featuring Gavin MacLeod ("The Mary Tyler Moore Show" and "The Love Boat").
Guest star Michael Constantine (Mike Cooper) was at this time still playing Principal Seymour Kaufman on Room 222 (1969). That sitcom's title was spoofed just two episodes later in Room 223 (1971).