Hux knows Ren likes to snoop in people's heads, so he trains himself to think of the most outlandish things when Ren is trying to mess around with his mind.

Things like Ewok version of the hamster dance, soap opera scenes starring Wookies, insane things to get Ren to back off. Sometimes he'll imagine ridiculous versions of what he actually wants, like lying naked in a he'd surrounded by rose petals, telling Ren to "come here, big boy"