either create a custom species in character creation(it would function similar to create-a-style from the sims series, only allot for the adding of multiple eyes, genitalia, tails, limbs, ears, etc)

or, in later levels, allow you construct test subjects from the ground up, using junk genes(fluids from other subjects like blood, urine, semen, vaginal secretions, floors, counter tops, toilet seats, door handles((alot of genetic information can be found on those things, bacteria, virus's, fungui, shin flakes, etc)) )

Either added as a product we can rub on or a color/marking option to give our fur/skin/scales/feathers a shine.

I was thinking, especially with how popular breeding season was, if you could use your character, or (2) Specimens to breed one another, which would then (using a % for chance) would create a new specimen based on those (2) character's physical and non-physical traits. This would probably be a pain in the butt to make, but this would allow for a lot of different gameplay scenarios, and would be a cool addition to have. You could also then sell those specimens, and buy new ones, (again similar to breeding season).

On subjects, in their holes, after oral

A way to implement tentacles without having to spend ages trying to get them to work properly is to make them into a bondage apparatus with the choice to upgrade it for automatic "functions" that could stay on without the player being present.

Said this in a separate post but without proper title  , Options for the facesitting should be updated.

1:Sniff

2:Oral

3:Smother

Scuba gear and underwater

title^