This fragment of fic came to me from the much better and more prolific writer who seems to dump them in my brain at whim:
"That's impossible." he retorted, sweeping his sonic screwdriver up and down in the air around her. "You can't be perfect in every way."
"I can." she replied, with the comfortable air of someone who was always, always right. "Besides. I said that I was practically perfect. One shouldn't get bigheaded about oneself." She swatted at the screwdriver. "And it's frightfully rude to analyse your guest's molecular structure. Especially since you haven't introduced yourself, Mister...?"
"Doctor." he replied absently, putting on his 3D glasses and seeing if those had any effect. "Just the Doctor."