the best SVSSS ship is actually yuanjiu because they have a) no history and b) are perfect for each other
big tall handsome wandering cultivator shen yuan who muscles his way into shen jiu's heart by being confident, competent and no-nonsense. But he's simultaneously everything SJ thought he'd never want in a man.
SY drools at pretty women, frequently makes crass jokes at SJ's expense, is a touch too soft on SJ's disciples. He has bad taste in literature, is lazy and untidy. He never listens to SJ. He often leaves on long trips with SQH, and seems to be best buddies with LQG! Unforgivable!
But. He massages SJ's feet whenever he's home for the night. He tucks SJ into his arms without fail everytime SJ so much as sighs. He makes time for SJ to whip his back bloody everytime SJ needs to let off steam. He let's SJ do many many dirty, depraved things to him, things which would have him labelled as a demented pervert in the presence of others.
It's not quite love though.
(while SJ is busy sucking SY's toes, SY is freaking out because he almost kissed SJ on the cheek today. Does that mean he like-likes SJ?!?
He's gagged and tied up into a pretzel though so he can't exactly ask SJ about it. Maybe he'll be allowed to talk when SJ is riding him later?)