Disclaimer: This story is based on characters and story from BBC and Arthur Conan Doyle. No money is being made and no copyright or trademark infringement is intended.
Prompt: Sherlock buys milk. John's reaction
Wednesday started awfully with John spending twenty minutes looking for his left shoe (stolen by Sherlock in the middle of the night for one of his experiments), and then got worse when he'd run out of milk and he had to eat his cereal dry. "We need some more milk, Sherlock," John said offhandedly as he was preparing to leave. Of course, John didn't actually expect Sherlock to do the shopping, but when John got home from work, much to his surprise, there was a jug of milk sitting the fridge.
"You actually got the milk? But you've never picked up the milk before."
"I've never required it. I'm lactose intolerant, therefore unable to process dairy products."
"So you… bought the milk for me?"
Sherlock fixed John with an intense stare. "Yes, John, I did it for you. Is that so surprising? Aren't flat mates supposed to help each other?"
"Yes, supposed to." Awkwardly rubbing the back of his tired neck, John turned to go upstairs to his bedroom.
"Oh, and one more thing, John; you will need to pickup my dry cleaning on the way home tomorrow."
John turned around to give Sherlock an exasperated look. "What? I'm not picking up your bloody dry cleaning!"
"But, John," Sherlock said with an air of innocence, "I picked up the milk."