I haven't looked around a lot but I do, occasionally, download the blowjob LoRA that I see posted, though their usefulness hasn't been well established on my end and I don't really have that kind of energy to figure out the crans and nookies to get them to work and please, if you made some of those, don't feel as if I'm being dismissive (I'll try yours if you point to it), I'm just not deep into it, but I know how mine works and, while I'm not a frequent flier, I feel as though my sheer lack of motivation, allowing a LoRA to train for 10's of hours while doing other things, just to see what happens, may have a bit of value, so maybe people will let me know how this one turned out.
whew long sentence...
The dataset for this LoRA was generated exclusively using Illustrious, containing 131 images of mostly oral, with various depth of penetration, mostly side and angled views, some POV, laying and kneeling, some clear images of just penis, some men with pants down since this seems to be a struggle for models, and most of the women are either demons or alien of some sort, though humans are easily produced without difficulty, some few are human and some demons/aliens have human colored skin.
While there are specific images in the set containing penis with foreskin it never seemed to converge and none of my generations were able to produce that result. (Update: during generation of example images I had quite a bit of luck, though with some deformations often times).
Mixed races, dark and light skins, Asian, American, misc.
Some key words to include in your prompt might be ...
leather harness
wings
horns
spaded tail (this need cherry picking, the spade lands where it wants)
demon
succubus
alien
pants down
jeans
suit
prone
on back
kneeling
side view
deepthroat
blowjob
pov
pale
pointed ears
... and any number of imagined colors for skin, though blue, green, pink, red and brown are prominently trained in.
Some difficult poses never worked, in any of my LoRA, and were trained into this one but, again, didn't converge like blowjob on back, we just get body horror. (Update: I conditioned a prompt to get close to this in the original display image).