Heaven on earth for some subjects, painful unpleasant procedure for others.

Could it be possible to make it where a test subject would beg and cry, bawl even, if abused or is overcome with pleasure. Like maybe when you are milking a subject for to long or if the subject is particularly sensitive to pain, so things like spankings, whippings or whatever  will cause the subject to slowly start to beg and cry for you to stop. Not every subject would cry  or beg of course, different subjects will always have different pain tolerances I just want there to be an option for that sort of thing.

despite what it seems like...this one is more specific: it's about vibrators...with the ability to swim inside the bladder/prostate of the subject, and cause enormous levels of G-spot/P-spot stimulation from inside.

...if desired, the sex toy's signature effect, could also be a mixture of strong genital twitching and an ejaculation blockage while the toy is inside (thought, of course, the ejaculation would drool out after removal of the toy).

another side suggestion, is for males to be able to reach multiple orgasms in a row once the pressure levels within the bladder-prostate area are high enought to unable the seminal vesicles from expelling the semen (hence, not triggering the male refractory period) ;D

When precum dribbles out of a penis instead of just beading up on the tip.

Something like animal heat, or drugs to simulate or something like that. lower refractory periods, involuntary arousal, increased sensetivity, stuff like that?

I would absolutely love to see a middle ground between "not touching your subject at all" and fully-pleasuring them. Like, maybe you could take one finger and lightly twirl it around their navel, or nipples. Or maybe twirl your tongue around the tip of their dick. Something to make subjects squirm, giggle, and fidget around that isn't overstimulation or "regular" pleasure.