Somewhere on your character's display and the test subject hud.

This might also come in handy for sizeplay situations, to rule out cub

Not only giving the subject the ability to be a dominant force on you but also having a revenge option which will allow the subject to pay you back for everything you did to them (with or without their consent)

Maybe add an option how sensitive your character's anal G-spot is, so you can make your character cum hands free by riding your test subject if sensitivity is set to high.

To make things go a bit more smoothly, or very roughly if desired.

Not to the level of C&BT; just the ability to set a sheath swaying or balls swinging.

Maybe be able to put clothes on characters on the rack, Have a character in his underwear or even wearing full pants and then interact with him, jerk him off through his pants or hold a vibrating wand to his penis and cause him to to cum in his pants. You could have it as a separate fetish/preference slider, where some characters might not mind to much or be aroused by it, but some characters would absolutely not want to cum in their pants; it could make them embarrassed or feel humiliated and try not to cum until you take them off. You could expand on the speech system too where if they are getting close they beg you to take them off quickly before they make a mess. or if they are leaking precum they comment on how they are making a mess ect. Or when you tell a character to cum they can comment how they don't want to until you take their clothes off and try to resist. and when they do cum or are leaking precum, you can see visible wet patches wet for precum and dripping white like on the characters bodies for actual cum

The idea of having a sidequest sort of thing where you go about doing a long term series of experiments and sciency sexy time with the end goal of breaking a person's will (for a variety of reasons) or altering their mindset into accepting a new fetish or sensation they otherwise wouldn't enjoy, or make them orgasm from sensations outside sexual stimulus.

an example scenario for what I mean in terms of changing mindset / breaking willpower is:

Have a straight, male subject come in and then strap them into a long term holding cell. Your objective is to break them into enjoying anal, despite how fervently they're against the idea. You set them up with something to stimulate them anally and a device to pleasure their penis so as to gradually get their mind to attribute anal stimulation with regular pleasure. You set them up and they're held there like that for a set period of time (can be adjusted for gameplay convenience) and you check in on them every so often to see how they're doing, see how many times they've achieved orgasm, willpower, sensitivity, etc. You can also take the time to speak with them, offer some opportunities for humiliation or encouragement, depending on how sadistic you want to be.

Depending on their progress, you can add or modify the current devices offering the stimulation. For instance, you can enhance the anal stimulation to produce a more pleasurable sensation but keep the penile stimulation at the same level. OR, you can gradually reduce the penile stimulation.

After several sessions of this, eventually you'll set it up that all he has for pleasure is anal stimulus, but he's far enough along that he might just climax from anal alone.

Once he's achieved several orgasms from just anal stimulation, you can set him up in the main experiment area and have some additional fun with your subject and see just how much they enjoy anal now.

Depending on whether you humiliated them or encouraged them, they might take to the sensation of being brought to orgasm anally and it'd be less of a "mindbreak" and more of a "Mind opening" for them (happy end) and they enjoy anal now.

OR, if you were more sadistic and constantly antagonised and humiliated them during the process, they become resentful and hate the notion of being able to climax from anal stimulus, opening even more opportunity to antagonise and humiliate the poor guy. ALl the while they detest being given anal stimulus, even though their body craves more of it. They can either eventually break and give in to their new desires, or remain steadfast in their rejection despite how desperately they need their ass to be plowed.

Another option is tricking their mind into believing that they can't cum without anal stimulation, watching them try to masturbate and be unable to cum without having something in their rump, or being unable to cum unless all they had was anal stimulation.

An example scenario for climaxing from sensations outside sexual stimulus:

Have either gender individual in a similar predicament, only this time, your objective is to get them to cum through other stimulus not typically associated with sex. For instance, tickling (or tickling specific parts of the body)

for example, tickling the navel of a female while having her lady bits recieve proper stimulation so that eventually her mind attributes tickling with sexual stimulus until she can be brought to climax by tickling her navel alone.

Another example of this is fondling of the ears or other such sensual touching that doesn't involve direct sexual stimulation. Same rules as above, offer the sensation and give sexual stimulus until the subject associates the sensation with sex, then repeat until subject can orgasm by just that sensation alone.

TL;DR: give the ability to have a side quest (possibly with its own test chamber) to modify the behavior of a subject through mental conditioning to whatever the player desires, specifically: implanting them with a particular fetish or having their body react with sexual arousal (to the point of climax) from certain stimulus that isn't supposed to be sexual, or is otherwise not something that would arouse the subject to that extent (such as a straight male receiving anal). Also make it possible to do the short and fun way in the main lab for those short on time or who prefer a more hands on methodology.

I hope I explained this in a way that folks can understand.

I noticed that performing blowjob on a table gives a good position for 69. I don't know whether or not it's planned already, but i think it's possible to add a 69 as a second option to blowjob or as an order that can be given to subject via "talk menu" (i like this option more, i'll be honest).

And of course it would be mega nice if you could perform 69 in all combinations (blowjob/blowjob, cunnilingus/cunnilingus, blowjob/cunnilingus).

Of course that brings some problems like how it should work with size difference and what you should control in that scenario - your head, your pelvis or both?

I think for starters using only your head would be enough. A simple solution would be making the subject to mirror your actions. After that in future you can make the subject "do it" depending on one of their meters.

But of course i'm not telling how it SHOULD be done rather then how it CAN be done.

Some guys produce precum at the drop of a hat, even when flaccid. It would be nice to adjust how easily your character produces precum.

Also being able to adjust how much precum your character produces could be nice.

These controls could be applied to vaginas as well.