Currently (unless I am mistaken) one must hold down the left mouse button to perform actions when interacting with test subjects. Releasing the button immediately cancels the action.

I propose an option to allow a click to begin the action with another click to cancel the action so that left click (or the assigned button) must not be continually held down lest the action be cancelled.

This suggestion's approval or dismissal is meant to be about simply the idea of interaction without constant user input. The following examples are just chatter on the subject that goes much further, but all would require the ability to continue an action without continuous input.

Perhaps going further holding down the button (or another input method) could allow recording of movements to be repeated until cancelled. If various parts could act independently this would also allow multiple actions if appropriate animations existed, such as fingering an anus while performing oral interaction or other combinations with reasonably feasible animation.

This topic is a rather advanced idea on the subject related to toys/machines, but I am also talking about player character actions:

http://fek.userecho.com/topics/256-programmable-machinestoys/

Taken perhaps too ambitiously such a system would allow quite a bit of customized automation if a gambit-like system were possible with the player character as well as machines/toys. At its most simple though, this suggestion is just to offer the option to not require holding down a button at all times.

If you grow your persons balls/breasts/udder so much (and item that lets you increase production of cum/milk) they will break the chair. but will still not be able to move there hands or feet since they are strapped so you have hyper goodness :D they need some milking and some fucking in order to re leave that presser :D they would then be supper sensitive :D (maybe sell the contents to make money :D) also this would be same if hyper pregnant with live or eggs they look ready to burst... but they wont they just look like it and they grow if not birthed :D

This would be nice

It's the only thing I'm missing from my sona, and I know a lot of other people have them on their drakes. Would look similar to this image by Morca:

I really would like to see this 4 devices in game they don't need any special utility but for example ring gag could later in development help with possible oral activity

using vaginal and anal speculum could be added visible contractions during orgasm or pain

and x-ray could be in form of glasses or tablet like device that allows you to see whats happening inside.

What about force the subjects to do some physical exercise like tied up on a treadmill leashed on the neck or balls or work with weights with butt-plug "punishments"

Tentacle pit / rack / thingy:

Basically a large pool or pit that the subject is lowered into and teased, tickled, penetrated, or sucked off by tentacles. You can either choose which actions the tentacle pit does or have it do things to the subject at it's own will. There should be different types of tentacles (Sizes, lengths, textures, etc.) For ones that would suck off the subject, maybe add an x-ray of it and different inner textures as well. (maybe tentacles inside the maw)

Living clothes / biosuits

Pretty similar to the last one but more fit for orgasm denial and tickling. Imagine Zero Suit Samus but the inner layer of her bodysuit is all tentacles and sort of a fleshy texture. Moving and jiggling to tease the subject. The more the subject resists or moves around, the more active the clothes become. Added xray would work and also protruding tentacles at any openings of the suit (neck, crotch, sleeves)

Palmjobs

Post orgasm torture yaaay!

After a subject orgasms and there's jizz all over the tip of their penis, you can rub the tip with your palm and cause them to either orgasm again or squirt. 

To put go fuck yourself on a whole other level.

where in the lab, a subject is transformed from one species to another