A/N: And now for something lighter, a brief case of mistaken identity during the Marauder years
Remus was walking back to the castle from Care of Magical Creatures when he was attacked.
He knew instantly that it was his own fault for lagging behind. He should have known better than to get separated from the herd this close to the weekend, when gleefully pranking Gryffindors were found in abundance. In fact, Remus was so familiar with the habits of his own particular set of gleefully pranking Gryffindors that being tackled by something completely invisible and dragged toward the Forbidden Forest caused him no alarm. "James!" he said in an exasperated tone. "You hurt my knee."
"James? James?" replied an indignant voice that did not, upon reflection, belong to James.
"Sorry. But seeing as how you're invisible and have apparently stolen his cloak, you have to admit it was a pretty good guess-"
"Who is this James?" Sirius demanded, gaining the edge of the forest and pushing Remus up against a tree.
"Rather dashing fellow, actually."
Sirius' response was swift and predictable-he kissed Remus. Not just any kiss; the kiss of a man whose boyfriend had just mistaken him for his best friend, and then complimented said friend. The kiss of someone with a point to make.
"Now who do you think I am?" Sirius asked when they came up for air.
"Sirius," Remus replied with a smile, not bothering to open his eyes.
"And who's this James fellow?"
"Never heard of him."
Sirius grinned. "Damn right."