A surprise fact about Victor Nikiforov: he is incredibly tactile. Once you become so much as a slight acquaintance, he's immediately very touchy: hands on arms or shoulders, playing with hair, face squishes, hugs. Yakov's tried to break him of the habit for years—the amount of gossip it's produced, good lord—but with no luck. The only one who's come close to not being a victim of Victor's perpetual touching is Yuri Plisetsky, mostly because he threatens to slice Victor's hands off with a well-executed quad Salchow whenever he tries.
A well-known fact about Katsuki Yuuri: aside from when he just barely makes it to the Grand Prix Final, he does his best to avoid touching anyone. If Yuuri lived in a world where touching someone would immediately kill you, he would be in heaven. Phichit Chulanont reportedly has had one (1) whole non-stressed-out hug with Yuuri, with photographic evidence posted on his Instagram with the caption: "This actually happened!" followed by several shocked-face emojis.
Another surprise fact about Victor Nikiforov: He loves that Yuuri doesn't touch anyone.
Because Victor is inherently a very selfish person, and the last thing he wants is for the world to know that Katsuki Yuuri, Japan's Ace, is also the world's best hugger. Because then someone else besides himself could be on the receiving end of one of Yuuri's hugs, and the very thought makes him so jealous he needs to go for a run.
(He ran around the entire circumference of Hasetsu in roughly ten minutes when Emil tweeted about Yuuri's post-Rostelecom hug fest after assuring Mama Hiroko and Papa Toshiya that he was fine through clenched teeth.)
But it's more than the fact that Yuuri gives spectacular hugs. With something so rare, Victor can't help but feel special every time Yuuri deems him worthy enough to give up his personal space for.
And it comes from such a different place than Victor's touches. Victor needs to touch, to get that extra confirmation that the people he loves are still there, still close, and still like him. When he hugs Yuuri, there's always a very, very faint note of desperation. Don't leave me, his hugs say, even if it's very, very quietly.
Yuuri's hugs don't have that. When he wraps his arms around Victor, there's incredulity, maybe. Doubt, possibly. But never desperation. Because even if he can't always believe it, Yuuri hugs Victor because he knows that Victor is his. You're here, his hugs always say, steady and warm and so, so in love.
So can you really blame Victor for not wanting to share?