‘The Flintstones’, Three-Headed Barney
A popular kid’s cartoon in the 60’s, The Flintstones, doesn’t have very many dirty-jokes per-se. But boy does Barney deliver with this one. While Fred and Barney are costume shopping, Barney says he wishes he were taller. Fred points out that Barney would need another head for that to happen to which Barney replies, “anotha one? What do I need three of them for”? The chuckling between the two after the comment means, yes, he meant what you think he meant.