What about a room or just the possibility to emulate area like beach, forest or desert for "scientific experiments ", naturally with themed gears

Add the option to cumbrush your subject either with your or their cum

A particularly untapped fetish of mine is having ghostly disembodied hands fondling and molesting some helpless individual. I'm thinking maybe have a little wooden totem of sorts that you can fiddle with and summon ghostly hands to molest your target client (or you).

it could work on the possible mechanics of unwilling, unwanted stimulation (ghost rape anyone?) or have passive arousal and pleasure effects from the gentle caressing and fondling that the hands would do. Maybe have a penile varient where a ghostly dick appears and has its way with the subject while the hands freely molest away. It'd have obvious player controls of course, but I'm thinking maybe you could have a pre-set customizable set of actions that the hands would perform, maybe have the player character use the totem on themselves to set up the fondling animations and such in the background while you work with the phallus, etc, or vice versa.

It would be neat side mechanic to have a negative (depending on your perspective) effect from using it too much that makes it backfire and has the ghosts start molesting and stimulating you instead when you next tried to use it, hampering your ability to do things because of the fun stuff the ghosties are doing to you. Lots of phantom molestation making you cream your pants, with potential for humiliation from the awkward faces and sounds you'd be making from the constant stimulation the naughty ghosties would be doing to you, as well as the embarassment of having jizzed in your pants a few times. Best part? No one else sees them except for the person using the totem and the target of the totem.

I know this may be a bit too complicated to implement, but I figured I'd at least put the idea out there and see if it could be a possibility or not. If not ghosts, then maybe something with similar mechanics as I described above, or some of the above mentioned mechanics under their own things

No gore, but if there's an option to modify a subject's body and you alter it sufficiently (e.g. creating a dickgirl/cuntboi/nullo or altering them completely) they remember the gender they were and react variably (e.g. some are happy with their new body and aroused, some are horrified/upset etc etc)

I'm thinking about this scenario where you could drug a test subject or whatever and then let him satisfy him/herself however he/she wants (assuming test subjects in Rack 2 will have, like in the first one, sexual preferences). A male could go grab a toy and masturbate or a female that likes watching could use those sort of automatic toys on other test subjects and many other.

Personally, I don't think such a feature would be hard to implement. It doesn't have to be too complicated (merely randomizing between the three highest fetishes of the subject and eventually a little bit of pathfinding would suffice, I think) and simply giving the option would add quite a bit of depth.

I really hope this makes it's way into the game. I think that for the effort required to implement, it adds a lot of depth. If I'm wrong, sorry for assuming.

Since some of us may enjoy a bit more testosterone for our characters, this should be only appropriate.

It'd be pretty cool to see a skinny goth otter guy in some metal band shirt, spiked bracelets, and programmer socks getting jacked-off. Or a chubby tiger lady getting buttfucked in a tube-top and platform heels(Neato!).From sports jerseys to bikinis, a little covering can go a long way. A naked body is sexy, but I think sometimes added clothes, revealing or not, can add another pleasant layer to the whole.

Using special table or where you want(maybe on chair)

I know watersports are a maybe, but since tickling is going to be included I feel like having the option of making your subject pee themselves after a certain amount of tickle torture would be really cool. and them have them be embarrassed would be a plus too. 

a multiplayer game, so you can choose reactions and listen to commands.