In exchange for letting Hux keeping his rank, Supreme Leader Kylo Ren makes him his personal human urinal.

Might I uggest
- Calling Hux away from the bridge, orfrom his off-duty hours, to relieve Kylo?
- Kylo getting off on watching Hux waddle around, plugged up full of piss?
- Hux feeling humiliated when he realises other officers know what he's doing? (or atleast that he's trading his body for his position)
- Hux eventually getting really into it?