Veronika and Diamond both have healthy attitudes and think that they each have the strongest and best bellybutton. They challenge each other to bellybutton fighting. The girls play with their own bellybuttons to tease each other - fingering them before they align them for the fighting. Pressing their tummies together - lining up bellybuttons - the girls battle it out - grinding and sliding their bellybuttons together. They decide to add some water to their bellybuttons thinking that the friction will be better. They end up on the bed - with Diamond on top - battling with their bellybuttons. They each end up with bloodied navels from the duel.