Hux’ father had put an implant in him when he was still a boy, to make sure Hux never gets distracted by things as trivial as sex. Because of that Hux never wanted anyone, never had an erotic dream, never even had an erection. All carnal things are completely alien to him. When his implant breaks Hux is completely overwhelmed by the new, unknown desires, and by his body’s reaction to them. It would be thrilling if it wasn’t terrifying. Kylo decided to help the general explore his sexuality.