The below
search reminded be of a *different* story involving Eames incepting Arthur. In this one, Eames incepts Arthur into having sex with him. It was very dark, and involved Eames subverting Arthur's totem.
There were several chapters, the later of which involve Arthur going to Cobb for help. Last I saw, it was a WIP.
The story involved Dub-con/Non-con and I think that's why I didn't bookmark it in the first place.
Found thanks to
we_reflamingos. It's
The Totem by
starkraves.