Hi again :) Re: Discord - it tends to have more updates, otherwise I'm also answering people's questions there - but aside from the updates, it's information scattered everywhere. There are a few things that people have asked about that I won't be able to do in any case. One of them is something you have mentioned too - height variation. That one's a no can do, due to all animations being paired and needing to align at all contact points (e.g. different heights would cause kisses / genitals to be misaligned, the hands would not grab the right spots and would likely clip or miss entirely, that sort of thing). Unlike a traditional beat'em'up, where characters are mostly separate, here all actions that happen involved a very closely align setup of both characters (i think they're called paired animations, in general). There is IK (inverse kinematics) that would allow you e.g. to have a bone chain reach a certain position - but I'm not sure it can be easily used on such a scale and for so many contact points (it would require me to define multiple contact points on all animations, basically, and I'm not sure it would be enough in any case, since some bone chains would need to have particular orientations so as not to clip). There are about 440 paired animations in the game, and more to come. Defining grab spots for each of them isn't something that I want to do.
Re: the palm / soles coloration thing - I'm not sure there's any easy way to soften edges and such. I gotta say that's not something I'm prepared to invest time in, in any case, especially with it being a feature that I kinda consider broken from inception. I tend to place the 'good enough' threshold somewhat higher than usual I guess, and it would bug the hell out of me knowing that's there looking bad :)
Re: spitting - the limitation is not around the spit itself, but rather that spitting involves an animation (the lip/head motions for the act). Now, unless you defined very clear and unique points where spitting can happen and baked that lip/head motion into those particular animations, you'd need to blend whatever is happening at that point together with the spitting animation (e.g. standing face off + spitting, missionary + spitting, punching + spitting, etc.). That blending is the thing that Godot doesn't allow me to do from code (it is theoretically possible, but not for such a high number of animations, in any case). Otherwise spitting you can do easily using particles (e.g. same way as ejaculation happens).
The build up of fluids is potentially doable, but it's something that I need to investigate. It's not trivial, normally, and until recently my default position was that it couldn't be done reliably - due to the large amount of body customizations, as you can't really determine where a point is on the surface, when that surface moves and changes arbitrarily based on the user shape customizations. Now I came across something that MIGHT help - but I haven't delved into it so I cannot say for sure if it would work or not.
Re: Slapping - I don't consider that hardcode, as long as it's somewhat limited, so it's not off limits. Biting nipples is a no go however, since - getting back to the paragraph above - you cannot tell where the nipples are (think of all the breast customizations, from a flat breast to a heavy, saggy one, all the way to a perky thing - all these cause the nipples to be in a quite wide area). So you can't bake the mouth position on the nipple in an animation, because that nipple might be higher up and to the left.
Re: the headbutt thing from e.g. a missionary position - how would that work? Because unless I'm missing something, the only way to headbutt someone from the bottom would be to hit them in the mouth - and a head to the mouth thing would be a limit. A headbutt to the abdominal area I'm ok with though, but I can't see it being physically possible from such a position.
I also think I need more clarity on the tackle action things. When you say bearhug to on the ground, grabbing ankles to on the ground - those already exist? Do you mean others?
Re: that gap thing between various options - that's a somewhat creative way of implementing some sort of separation between various categories (because I'm not aware of being able to do it otherwise). It's basically an empty row on the list, but it yields two horizontal lines that should visually enforce better separation.
Have a very good day as well :)