Like many in Fox's stable of characters, Jo-Jo started as a rip-off of another popular title—in this case, the loin-cloth-wearing, jungle-dwelling Tarzan created by Edgar Rice Burroughs. What made Jo-Jo famous were his love interests Gwenna and Tanee, who shared two things in common: they were always scantily clad and spent much of their time tied up. When he wasn't rescuing his voluptuous girlfriends from peril, Jo-Jo often found himself battling jungle tribes that were often made up entirely of bikini-wearing women. Stan Ford (a pseudonym) is credited with some of the stories, and artists Jack Kamen and Matt Baker supplied much of the series' risqué "good girl art." Their work earned the series a mention in Dr. Fredric Wertham's book "Seduction of the Innocent."