"Ouch!"
"It was only a needle, shut up."
"And WHY did you stab me with a needle, exactly?"
"None of your business."
"It's my body, Sherlock, I think I should be told what deadly virus you're injecting me with."
"I'm testing the theory that a certain percentage of the population is not allergic to mosquitos."
"And you couldn't have just asked me?"
"I couldn't have been sure you would be completely honest. A blind study is always best."
"Oh, that itches. Thanks, Sherlock."
Sherlock made a note on his clipboard. "Relax, you won't die. As far as I know."
"Sherlock!"