The show's way ahead of you...

"I'm suffering the after-ness of a bad night of badness."
"You didn't! Not with Parker again."
"No, with five really smart guys."
"Five! Ow. Oh. Oh, Buffy. Are you okay? Want to tell me about it?"
"I went to see Xander, but then I saw Parker and… then came beer."
"And then group sex?"