While none of these models were explicitly tagged NSFW that I noticed, and don't bill themselves with NSFW images, Pony Diffusion is trained on NSFW images and thus brings that knowledge to derived models. It can understand Danbooru tags, which include a fair number of sexual acts, sexual poses, fetish clothing, sex toys, and suchlike.
I'd also assume that if Luce catches on, general models not specifically intended for generating images of Luce will also learn what Luce looks like as images containing Luce make their way into their training corpuses; that would presumably include NSFW general models.
EDIT: No, I take it back. This Pony-Diffusion-based model, this, and this one do use NSFW images in their example image list if one cycles through the whole list of images. It may have been hidden before, as I was checking the site anonymously, and I believe the civitai default is to hide NSFW content. Also, this model has some suspiciously well-endowed Luce images in its example image list, and this model doesn't have nudity in its example images, but does have Luce flipping the viewer the bird in an example image, which I imagine is probably sacrilegious.
As someone not logged in or with an account I keep getting
These images hidden for mature content settings
From swiping through those thumbnails so.... I'm taking they are able to generate some NSFW images just fine.
Honestly who is using AI generation for anything but that? I've only heard about fursonas and D&D stuff as well but let's be honest roleplay was secondary use of that dungeon too.