Of course he'd ended up back at the school. Shylock had spent the day trying to convince himself that he wasn't going to do this, which was more or less a give-away that he actually would. And then, he had, because his self control was delicate and fragile and would be better off saved up for preventing him doing other things.
It had nothing to do with wanting to snog his boyfriend's face off. Like, at all.
Besides, it was too early for that. Judging by how many kids were still out in the halls, it wasn't even dinner time yet. Selwyn was sensitive about the kids. Or, Shylock supposed, he was sensitive about their parents. Either way, he didn't want them figuring out their relationship. Personally, Shylock thought that was ridiculous, since Pierson's relationship was common knowledge, but it wasn't worth getting into an argument over.
So with all this in mind, Shylock started making his way up to Selwyn's rooms.