Rating: Author says Teen, but I'd say All Ages (PG, but not PG-13 if you're familiar with those ratings)
Word Count: 3079
Author's Summary: Besides, Rose was quite certain if there’d ever been a human celebration crafted to make the Doctor uncomfortable, it was probably Valentine’s Day. Rose held no delusions about him being the sort to enjoy candlelit dinners or long talks about feelings – he was, after all, still the man who’d said “quite right too”.
Characters/Pairings: The Duplicate Tenth Doctor/Rose Tyler, Donna Noble (Pete's World version), Jake Simmonds
Recced because: The Duplicate Tenth Doctor is a fascinating character, and there are many excellent fics out there that explore how he deals with learning to live as a human. Some of them are moving, some of them are thought-provoking, and some of them, like this one, are just plain fun. The author quickly and deftly establishes a scenario where the Doctor is in a stable relationship with Rose and best friends with alt!Donna, then sets up the premise: it's Valentine's Day. The Doctor is, of course, clueless. What follows is perfectly in character all the way around -- Donna in particular is wonderful -- and it's an absolute joy to read. The learning-to-be-human Doctor and Valentine's Day? Be afraid. Be very afraid.
“I was meant to get a bag of milk — honestly, a bag of milk, this universe is mental–”
“There’s nothing wrong with bagged milk,” Donna found herself insisting, defensive as always at the implication that her world was “wrong”.
“Anyway,” he went on, “I was calling to ask if you know why everything’s...” He trailed off, seemed to deliberate what adjective to use, and then said (in a highly suspicious manner): “...pink.”
“Your milk is pink?”
“Of course not, don’t be ridiculous. But there’s an entire aisle of... pink and red and all sorts of... bears and things.”