Ok we all knew this was coming the moment we saw that collar. Give me Caleb asking to give up his power during sex, asking to be vulnerable from an initially hesitant but eventually eager partner.

+ Caleb both genuinely wanting this but also feeling fearful and anxious initially because being that vulnerable is terrifying (if you find some way to tie it back to helpless feelings, eg. Ikithon, the asylum, in his past I will love you forever)
+ Caleb eventually letting go and finding some amount of peace in that relinquishing of control
+ If Fjord, Fjord trying to be polite and checking in and Caleb basically having to lock the collar on himself to get him to do it, but it's not long before he's super into it
+ If Essek, Essek being very conscious of what a vulnerable place Caleb is putting himself in and being genuinely concerned, but agreeing to trust Caleb to know his own limits
++ Fingers hooked in the collar, mild breathplay
++ Silent moaning, and what that looks like for the observer
++ Aftercare!!