If you love AU's that take a cracky premise and make it believably in character, then I'd highly recommend the WIP Making the Connection (NC-17) by JessamyGriffth.
The story is set pre-canon, with John having just been sent home and in need of some cash. He becomes a phone sex worker, and gets a call from Sherlock, who's conducting an experiment.
What I love about this story is how John is able to quickly get inside Sherlock's head and turn his whole world inside out. It's also fun watching Sherlock deduce John over the phone.
If this sounds like something you'd enjoy, then don't let the WIP status deter you. You can easily read the first 31 chapters and feel satisfied.
Here's the link in AO3 (http://archiveofourown.org/works/255682/chapters/398167?view_adult=true)
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The story is set pre-canon, with John having just been sent home and in need of some cash. He becomes a phone sex worker, and gets a call from Sherlock, who's conducting an experiment.
What I love about this story is how John is able to quickly get inside Sherlock's head and turn his whole world inside out. It's also fun watching Sherlock deduce John over the phone.
If this sounds like something you'd enjoy, then don't let the WIP status deter you. You can easily read the first 31 chapters and feel satisfied.
Here's the link in AO3 (http://archiveofourown.org/works/255682/chapters/398167?view_adult=true)