Anakin/Obi-Wan established relationship. Obi-Wan really gets off when Anakin acts submissive, calls him Master, etc. However, he feels extremely guilty and embarrassed about his desires. What kind of lover wants to hold down and use their partner like a fuck-toy? Especially when said partner is his ex-Padawan. So he sticks to vanilla, gentle sex.

Anakin, however, has noticed how excited his lover gets when he acts submissive, and is hellbent on bringing the dom out in Obi-Wan. Obi-Wan won't even admit his urges in conversation, so Anakin starts making certain requests in the middle of sex. Pull my hair, Master. Spank me, Master. Tie me up and fuck me, Master.

It's a lot harder for Obi-Wan to deny himself these things, or tell himself what a terrible person he is for wanting to "abuse" his lover, when Anakin is actively asking for it all the time. Eventually Anakin gets him to admit that he loves being a dom, and assures him that it's hella acceptable.

I'd like it if you could end the fic with them holding a scene, but it's not required. No scat or watersports, please.

+ Lots of focus on Anakin begging Obi-Wan prettily and calling him master.
+ Anakin being outrageously smug about knowing all of the buttons to push for Obi-Wan (outside of the bedroom, of course)