Goats and sheeps sounds great, and put things on horns, like rings or claws

There's a growth chemical but no shrink chemical.

Seems like an easy thing to add. 

The video updates for this game are always really well made, and do an excellent job of showcasing what the game has to offer. Especially the latest one ( the one from about a year ago, the 2.6 update trailer), that's a legit professional level trailer. Now obviously fek doesn't need to out out one for every single update, especially if it's only tweaking mechanics, but fixes etc, but say if next update is infact the big sex toy update, I feel like it could do with another trailer, to show off all the new toys, and get people hyped for the update. I'm sure feks already planning on doing more video updates, but in case he wasn't, I wanted to bring it up.

This should vary or be more effective according to your tastes

Placeable cameras[regular and concealed].

If a subject is nude while it knows it is being observed by a camera, it can gain pleasure via the exhibitionist fetish.

VR-glasses are a wearable item that show the subject wearing them the view from a camera, allowing it to gain pleasure via the voyeurism fetish[especially if the camera in question is a concealed one]. Which camera's feed the subject sees is determined by the player.

If a subject is wearing VR-glasses, it cannot see its local environment(duh).

If the player wears VR-glasses, move the view to whatever camera's feed is shown.

[the cameras' views don't have to be rendered unless the player is looking through them, in which case the player's 1st/3rd person view does not have to be rendered (especially since rendering multiple views in realtime is performance-heavy, and might be nearly impossible to implement depending on the underlying game engine)]

Optional 1: "streaming" a camera feed to earn a little bit of money on the side

[perhaps in the form of minor goals(that might not be what the subject likes)]

Optional 2: camera contact-lenses

A wearable that records/streams the point of view of the wearer. Counts as concealed to any subject that couldn't see them being put on.

A rack upgrade that automatically keeps chemicals in the subject's body at the desired[user-controllable] level.

If there is not enough of a certain chemical in the subject's body, it will automatically inject more, provided the user has the required chemical.

This is especially useful for chemicals that wear off over time.

If a chemical and it's nul-form have effects that cancel each other out, allow the user to set a minimum and maximum level:

If the subject is below minimum level inject the chemical, if it is above maximum inject the nul-chemical, do nothing if the subject is in between.

The ability to change a subjets gender thru perhaps potions or vials, perhaps because you like to try it out on the subjet? or perhaps they came to get the gender changed? As well as bimbofying them to start to get abit less brain activity if you woulc continue to have your way with them for quite a while. Maybe if made into possible to turn off and on the feture.

Currently, Sensexa causes the subject to feel pleasure, and Nul-Sensexa causes the subject to feel pain.

Instead, have Nul-Sensexa make it harder for the subject to feel pleasure[and nullify the effects of any Sensexa in their body], and make an additional chemical/nul-chemical pair for causing/inhibiting pain.

Use case: You accidentally overdosed your subject on Sensexa, and wish to nullify the excess. However, currently the only way to do so is to use Nulriset, which will also nullify any other chemicals in their body, which you might not want.