Homestuck is a coming of age story that likes to get metanarrative, deconstruct itself, and also fuck around and push boundaries because it's a mixed-media webcomic that can. While I don't have any interest or endorsement for NSFW content, it's hardly out of place, and (particularly in a written/character analysis medium) I think it's a component of the source work that some uncomfortable themes are explored. I'm reminded a bit of that movie from a couple years ago, Eighth Grade: “I didn’t want to make it R-rated. I just wanted to portray the way kids’ lives are. It didn’t feel like our responsibility to portray the reality that we felt was appropriate for kids.”

I figure this post isn't about all of that nuance, though. I'm not drawing or looking for drawings of that and they certainly don't belong in the general fan space. That's just common sense! If you're uncomfortable, block/extricate yourself and move on, I say.