Almost certainly nothing...
Scandalous rumors about an exclusive tier for some lucky Fans are circulating around the forest, but not much is known at this time.
2 or more aviation traits on your kinkajou may make it part of the coveted Mile High Club, with exclusive perks TBA in the future! Aviation traits include pilot hat, pilot uniform, stewardess hat, stewardess uniform, and the toy airplane.
Additional clubs with perks are in the works! The community will help determine some of these including the traits that characterize them and what perks might correspond to that club.
For your enjoyment and pleasure, here is a fun, nuanced article about the history of the mile high club:
https://www.theatlantic.com/magazine/archive/2014/01/a-brief-history-of-the-mile-high-club/355733/