The best part is when almost nothing changes between them, besides being romantic, because they're pretty much a married couple already.
There really aren't enough of those.
In the original script of season 3 episode 3, John wasn't supposed to marry Mary, it was actually Sherlock!
MARY: Are you sure?
(MARY takes off her mask. It's SHERLOCK.)
WHY THE HELL DID THEY CHANGE IT!?!?!
I think I might go yell and scream/sob in the corner now.
And as said: if the worlds most observant man thinks you are flirting with him you probably are!.
It makes me all "C'mon Sherlock, just...just kiss him. You know you want to."
sign it and share it and do whatever you can! an email will be sent to the BBC every time someone signs it, maybe if they realise how huge the Johnlock fan base is they'll introduce it, who knows.