Severus approached kissing as he did anything he was unfamiliar with, testing the waters, trial and error, and most importantly, with a lot of thinking, His brooding face was scrunched up as he filed away information to use for later.

Remus's arms and embrace was comforting more than constricting. Severus leaned into him, both to be closer still, and to find a balance for the way he unconsciously pushed himself up on his toes. He was a person that needed control, that needed to be in charge.

Having seen enough people snog in his young life, Severus at least had examples of what to do. Nibbling on Remus's lower lip seemed to have a good reaction. Suddenly sticking his tongue into the other's mouth was not so good.

At least he was not discouraged. If anything, he did his best to figure out kissing as efficiently as possible.