Ok this may be the cheesiest prompt ever but listen..
Sherlock is a wedding planner. He’s THE wedding planner. Everyone knows him, everyone wants him. He’s able to cater to even the most peculiar whims his clients may have. But he’s a nightmare to work with, of course. He can predict exactly how long a marriage’s gonna last and is extremely picky about the projects he takes on.
So when unassuming, plain, “do we really have to? We don’t need a freaking fairy godmother following us around!” John Watson reluctantly limps his way in 221b, with his more than enthusiastic fiancé, “don’t be absurd, John, of course we do, since you clearly can’t distinguish lilac from purple!” Mary Morstan, it’s clear as day the ill-assorted couple is doomed from the beginning. But instead of dissmissing them on the spot, he promptly decides that the project is definitely worth working on…
Pity that his number one rule is do not get involved with the groom!
But that’s alright because artiste extraordinaire “But what do you mean ‘any variety of Peruvian Lilies will do’? I don’t understand, they’re all thoroughly different from each other! ” and fed up army doctor “listen here cheekbones, I don’t give a monkey’s if she walks down the aisle with a bouquet of portoguese artichokes alright, I’m bloody knackered, I just want to.. is that double chocolate fudge cake?” drive each other completely up the wall.. right?