Hux wants to establish his dominance and affirm that he is ~alpha male~ over Kylo on the Finalizer. So he makes like a pick-up artist and does the following on Kylo:

-Unwanted touching
-Negging
-Ordering around
-Using condescending nicknames

Does it work? Does Hux lose a body part? Does he go whining to Snoke about how all Force-sensitives are bitches? Any outcome is fine.

Bonus
-Phasma hates that shit (of course) and seeks to thwart Hux at every turn