Oro doesn't socialize, yes. But we can groom him.
First if every time he tries socializing people think he's gonna dissect them, it's little surprise he doesn't try. Like why Yuno is a crazy axe killer.
Being a genius might have made him feel like he had no peers to socialize with.
And maybe being a missing nin and Nagato's influence has softened him up. And maybe the deaths of 3rd hokage and jiraiya made him sad and vulnerable.
HAZŌ: STOP!
Mari was clearly horrified. It wasn't often that
she punched above her weight in terms of persuasion and bluff, and the stakes were high enough to be considered an existential risk. Just
what did Hazō think?
OROCHIMARU: I do hope your interruption is warranted, nephew. I'd hate to discover you were wasting my time again.
HAZŌ: This is exactly what I'm here for. That attitude.
Orochimaru's eyes were wide as saucers.
Mari looked like she would like nothing more than to disappear into the ground, and so she did.
OROCHIMARU: What are y-
HAZŌ: I'm so sorry everyone's scared of you.
OROCHIMARU: I am puzzled as to why you would fail to conceive this is in no part my purposeful doing. I tire of this, so n-
HAZŌ: I know, that's what so sad...
OROCHIMARU:
Sad?!?
HAZŌ: You push people away because they cannot understand you... It must be so hard
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OROCHIMARU: what.
HAZŌ: And the few intellectual peers you had are now *chokes up* g- gone! Nagato, dead. The Yondaime, dead. Jiraiya, dead! You're all alone and unloved
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OROCHIMARU: I don't like th-
HAZŌ: Of course you don't like it!
OROCHIMARU (cont): -at you're playing this kind of game.
HAZŌ (cont, oblivious): Alone and unloved, of course you dissect people all the time.
At this point, it wouldn't surprise anyone that the crying Hazō offered Orochimaru a hug. Anyone save Orochimaru himself, who was wondering how this got here.
OROCHIMARU: B-back off! I'm serious!
HAZŌ: You need to stop shielding yourself! Shhh, there, there, it's okay. I used to have trouble relating with people to, but Momma helped me. Now I'll help you make friends
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The Snake Sannin, the most powerful ninja in Leaf and perhaps on the continent, the keeper of a million secrets and terror of a billion children on this plane and a few others could not suppress a shudder. Nothing he tried with chakra arts or applied killing intent, jōnin aura, or persuasion seemed to get through. Nobody could be THAT thick, so it had to be an incredibly powerful and potentially transmissible memetic hazard.
HAZŌ: But
I'll be your friend, don't worry!
OROCHIMARU: I forgot I left an experiment on and now it's probably cooked, I need to leave pleasedon'tfollowme
HAZŌ: I know you're scared but it's okay...
OROCHIMARU (frantically looking for a way out, thinking gravely impaired by fear of being subverted by alien information): I'lldowhateverjustLETMEGO
HAZŌ: My poor little meow-meow
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OROCHIMARU: *screams in Kagome*
Sorry I wanted to write three lines and then this got away from me and turned into 400 words