"See, this? What you're doing now, with the growling? This is like third base for you guys. Suddenly it all makes sense." Buffy isn't even bothering to conceal how hilarious she finds this anymore. Never before has she had such a prime trolling opportunity - not to mention the fact that she's genuinely curious about a few things. Such as...

"Sooooo, which of you was on top?"

She does not apologize. And seriously, when are they ever going to be drunk enough again to answer that question?