Sherlock and John tend to write texts without ever sending them, and when a message Sherlock never means to send somehow ends up on John's phone, John sees his love has always been returned. "If I were ever capable of emotions like deep affection, passion, or even desire, I don't think it'd go too far to tell you that you are, and the only one I will ever be in love with. "Post!TEH

"Tell me again why I'm doing this Sherlock?" "It's for a case John, I told you..." Sherlock gets permission to experiment on John on the pretext of solving a case, although the results aren't quite what either of them expected! Eventual Johnlock, with some fun hiccups along the way.