Hux and Finn are kinda a thing. Hux enjoys the company of an obediant, gorgeous, wonderful man.
Finn likes sleeping in a bed with satin sheets.

 It's casual. They're cool.

 Till Hux proposes.

Take it anywhere from there, other pairings and ideas welcome!
 
(but bonus points for kylo totally losing his composure and laughing hysterically when he finds out a stormtrooper broke out a fucking resistance pilot so he didn't have to marry hux)