Severus didn't think it was a spell at all, not anymore. He was almost positive it had to do with Remus being a werewolf. Severus could not, of course not, think he just managed to find a rare connection with another person.

"I'd like some of your hair," Severus said, not taking his hand back. In fact, he even moved a little closer still proximity to Lupin just made him want to be near. Severus, really, could only think clearly when they were apart, when his mind was not clouded by...this.

At least no one could see them, and if they did, well, Severus knew he'd just hex them anyhow. He couldn't help but think that this was slowly becoming a weakness, however.

"My theory is pheromones at the moment."