Add a separate Preference type that is "Interested," signifying a thing the subject doesn't know if they like or not, but wants to try. The symbol for this could be a grey circle with a question mark.

If you choose to engage in an activity of this type, you should go slow in case the subject doesn't like it (especially in the cases of Clients and Volunteers).

You could also have trying an Interested activity be an Objective. Paying Clients would give Satisfaction for having tried the thing regardless of whether they enjoyed the activity or not.

For dialogue, once you have engaged in an Interested activity, you can comment on it (or ask the subject about it) to see if they want to keep going with it. If the subject really likes it, you wouldn't have to ask to find out. If the subject really doesn't like it, they would tell you to stop.

If a Client or Volunteer tells you to stop and you keep going, Satisfaction would quickly drop and further failure to stop would result in the Client/Volunteer terminating the session.

A character-creation-menu with submenu instead of a list with all species in it.

Would become handy when more species are in the game. Like:

Canine -> Wolf, German Shepard, Arctic fox, Red Fox, Fennec, ....

Feline -> Lion, Tiger, Panther, Cheetah, .......

Equine -> Black Horse, Spotted horse, Unicorn, ......

Scalies -> Dragon, Raptor feathered, Raptor unfeathered, ....

etc.

Characters who are actually blind and have heightened (sensitive) senses. I feel like it might have interesting dialogue and interaction, and how they imagine things and color they haven't known before/their entire life.

I do not intend to offend anyone...

Having a bunch of people at once, all nearby. Maybe all standing straight up, or all laying next to one other, or something similar. Limits should be in place to not out-do the rest of the game's content in terms of what can be done to them (maybe automated things only) and who can be there (only squirrels or rabbits or something, for sanity of coding / rendering). But ... would be entertaining in its own right, and maybe a late-game source, high-yield source of samples, and only available once your lab has progressed and become popular in the squirrel community or something. Would be a natural reward of progression. Certainly would lack as much of a personal touch, but maybe that's its own fetish.

Painlessly removing or swapping body parts between subjects, especially genitalia. Sciencefully.

Possibly with a room to store/collect 'borrowed' parts.

e.g.

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I know that there was already a suggestion some 3-4 years ago where the idea was basically laughed at, but in recent years - as the title says, Valve is now far more open to 18+ content, including quite a few games with outright sex scenes: Knowing this, would it be at all possible to get a Steam release?

This may not be everyone's fancy, but I would like to see species such as snakes, crocodiles/alligators, maybe grasshopper, etc... just putting out ideas. If it's made right it could be good.

The idea is very simple, assuming characters have specific fetishes etc. I want to be able to satisfy characters / discomfort characters and see long-term effects on my actions. Like, if I were to give a girl everything she liked, when I come back she might say, "I was wondering when you'd be back." Or if I were to give her utter hell, she might say, "Oh, it's you again." You might have seen a similar idea on a much larger scale, but I figured this might be a good first step.