It took Remus longer than he anticipated because he stopped to make tea. Since it would have been rude to show up at someone's door with your own tea and none to offer, he then had to make two cups. He then carried them to Sirius' room and tapped on the door with the toe of his boots. Sure, he could have used several spells to make the whole process easier, but he really didn't care. Especially not now with his mind distracted as it was. His earlier conversation with Theodora had his thoughts going in plenty of directions.