Remus wanted to stop this madness, really he did, but he had a hard time making his thoughts turn into actual words and before he knew what was happening he stood there with all Sirius' clothes in his arms.
"Sirius..." His voice was not steady at all, he still intended to stop his friend but he was a bit distracted by the sight of Sirius' naked body. It was beautiful, he knew he should not look and he should not think of it as beautiful but it was. If someone would ask him, Remus would have to state that Sirius Black's naked body was beautiful!
He looked at James for just a few seconds and was glad that those schoolrobes would be able to hide a hardon the size of Hogwarts because it was embarrassing enough that he got hard with one of his friends there but now there were two of his friends there. He looked back at Sirius and he felt himself get even harder.