Smoke
Sirius drew in a deep breath off the end of his cigarette, the cool autumn air making him lazy. He is perfectly okay with skipping the first Divinations lesson of Fifth year because he could see exactly how it would play out. Someone would be predicted to die, some girl would have a fit about a love incantation, and he would feel sick in the hot, smelly room.
Remus suddenly materializes from the grove of trees that isolates the little shed. He walks over and leans against the shed next to Sirius.
"Is the great Moony skipping divinations?" Sirius asked, looking shocked as he glanced over at the sandy-brown head of messy curls.
"No," Remus peeked up at him. "It has been canceled."
Sirius raised an eyebrow.
"James blew something up and you are hiding from prefect duties?"
"Exactly." Remus replied. "You smell wonderful, by the way."
"Do I?" Sirius doesn't hear any sarcasm at all in Remus' voice and he turns a little pink.
"Yes, like...soap and leaves...and smoke." Remus said, looking over the coloring trees.
Sirius looked away. Now he knows he is blushing.