It's not very a mainstream fetish but as Wikipedia said (lol), it's the second most popular fetish searched on internet.

It could be cool to add to characters an navel and to play with it during sex session, such as fingering, licking it, tickling it, rubbing the cock on it (so hey) and cumming. If the character has this fetish, the anticipation goes higher and gets more aroused and asks to continue if it feels good, or to stop if it hurts and don't like that.. It could be possible to use "toys" such as pen, needle, wax or something like that for increasing the experience.

The navel can be an outie or an innie and the experience could be different according to the navel's type.

basically to allow devices that are handsfree masturbation devices that simulate the speed of the player character fucking the test subject

Possible phrases the player could say:

"Ahoy, ye pretty lass." (or matey)

"Me will make ye more wet than the seven seas!"

"Ye're more slippery than the barnacles I used to wash off me ships!"

"Yer so tight!"

"Me mast enjoys ye're warmth!"

"Me found mahself some booty!"

"Ye got yerself some nice booty!" (or pussy)

"Ready for a pillaging, lass?" (or matey)

"Shiver me timbers! Ye feel nice!" (idk maybe the player is getting boned or boning the subject)

"Yer more sweet than the salty briny deep."

"Yo ho ho!" (about to orgasm)

"Me about to explode like a cannon!"

Possible phrases the subject could say:

"Aye Captain." (instead of Master)

"Please be gentle, Cap'n." (instead of sir or ma'am)

"Sail yerself into me, Captain."

(If the player does something wrong or painful) "Ow! Ye scurvy shit!" or "Fuck off, ye scurvy dog!" or something

"Mah bunghole is awaiting for ye."

(most of the other phrases the subject could say would probably not be augmented by pirate speech)

Pirate clothes should also be in the game as well.

All of these garments look super dope.

How about adding a Drone similar to the one of the guy by the garage, only a bit bigger. You could give it simple commands like, move to subject x and put divice x in to their butt or stuff like that. But the main Idea behind it was that this drone uses some kind of energy to restrain subjects, giving you the option to perform simple actions on them whereever you are. But mainly it gives the player the option to move subjects between different racks mid session. Or to have a way of forcing two subjects to interact with each other.

I am aware that this would be a pain in the ass to programm and everything. But I thought I might just drop that here in case a certain someone feels like giving it a try.

Because why not? Strap a dildo to it and you're ready to go...

The distance for controlling the lights and door could use juuussst a touch more distance so you don't have to walk into the wall to control the switch, the door is more debatable, but would still be appreciated

Some Horse or spanish Donkey where we can leave some murring subject for struggling with Time and Effort - maybe a little electric Play.... to correct their Resist and Behavior.