Quietly Severus thanked any god and goddess that looked down on him with at least a little bit of favor. If he had kissed Lily he would not have just been setting himself up for pain that came from heartbreak, he would actually would have been in real physical pain by now. He was sure that Black would hex before asking questions, especially without Lupin being there. He might not trust werewolves but he knew that Remus did seem to have a more or less positive effect on the rest of the Gryffindors.
Without thinking about it he moved to stand a little in front of Lily, not sure if he was protecting her from the bane of his existence or Sirius from the temper he knew his lifelong friend possessed.
"It is called dancing, Black." He explained as if he was talking to a little boy with the IQ of a newt. "All sophisticated witches and wizards do it." The 'best defense was an offense, might be a cliche but it was true.