There's a minor innuendo where an anthropomorphic character entered into a dog show screams at a guy for checking out his "floof." This is in reference to the character's tail, but it's alluding to the practice of inspecting dogs at dog shows which involves touching contestants' genitals. Adults may find the moment inappropriate and potentially offensive, but the gag will likely go over children's heads.
An episode revolves around Mao Mao losing his clothes and being worried about people seeing him naked, but this is because he's embarrassed that people will see his weird neck and his lack of a tail. He shows his tailless butt to someone at one point, but there's no detail to his body aside from his basic silhouette.
While posing as a dog in an episode, a character wearing a leash and harness strikes glamour-shot poses, though none of them are too risqué. The leash and harness may make this scene seem like a sort of fetish-gear allusion to some adults.