Hirohiko Araki is a Mangaka known for creating Jojo’s Bizarre Adventure, there also exist a promenent
claim that he has achieved everlasting youth.
This mainly comes from the observation that he seems to age
backwards combined with the fact that he writes about immortal
vampires and martial arts that slows your aging.
Person 1: Hey, you ever notice how Hirohiko Araki seems to
just get younger and younger every year?
Person 2: Yeah, they say he discovered the fountain of youth in some
old Aztec ruins.