Rocket goes into his quarters one day and finds Groot there drawing rockets on one of his night diapers. Rocket flies into a humiliation fueled rage and snatches it out of Groots hands while yelling at him that he doesn't need them to have rockets on the, that he'll just pee on whatever is drawn on them, and that anyone could have come in and seen him holding his secret in his hands. Seeing this all upsets Groot though, Rocket calms down and apologies, and tells him to just be more careful in the future, and adds that the rockets are actually sort of cool. From then on all of Rockets night protection has art by Groot on them. It makes Rocket feel better when he looks at them knowing it means Groot is there for him every night.