"Nah, I'll be okay. Slayer healing is just another perk."
Buffy slipped off the table and landed neatly on her feet. She looked up at John with her best attempt at a bright and chipper smile-- but came off instead as a little tired and worn. Buffy looked down at her torn blouse with a frown: "Evil robots have no appreciation of my stylish yet affordable fashion sense. So do I get the John Watson Special Tour? Where's your roommate anyway? ...Can I ask you a weird question?"
Buffy made a face as if to acknowledge that it was, perhaps, too personal to ask.
"...Does he ever actually say 'Elementary my dear Watson?'"