"Watson, there's cat hair on my sweater"
Watson looked up from his laid back position in the overstuffed armchair to see Sherlock standing in the doorway, holding a miniscule hair up to the light.
"First of all, that's my sweater, and I have a cat, therefore there must be cat hair on it"
Sherlock nodded, and proceeded to put the hair under his microscope.
"Better question: Why are you wearing my sweater?" Watson said.
"What's mine is yours, and what's yours is mine"
Watson rolled his eyes and put down his newspaper.
Sherlock looked up from the microscope.
"Yes, or i'll hang myself again"
"I beg your pardon?"
"I said GO AHEAD"
Sherlock stomped out of the room muttering to himself.
"I swear no one loves me, not even your stupid cat"
Watson just smiled.
I know it's short, but I got this idea and couldn't put it down :D