Snoke orders Hux to do something about Kylo's impulse control issues. Hux decides that the best way to do this is to Dom him - and Kylo is forced to agree, having been told to obey the General's direction.

+100 bonus points for slipping in a shock collar or other kind of training device
+10000 bonus points for touch-starved Kylo who starts responding to Hux's discipline
+infinity bonus points for uniform kink