It's kind of annoying that some of the best models out there have a tendency to produce very not safe for work results.
Look mom, I can make some cool astrology images for you! Whoops, that's boobs. That too. And this one. Ehh, hold up, I need to add a pile of negative prompts first...
Sketching nude humans is a huge part of how human painters learn. Because surprisingly clothed humans are just nude humans with some fabric over them, and the fabric can make it harder to tell what's going on.
Even if we assumed equal amounts of effort, it wouldn't be surprising if a large corpus of nude images in the training data improved model results.
But maybe we should have better negative prompt presets for different levels of decency
Look mom, I can make some cool astrology images for you! Whoops, that's boobs. That too. And this one. Ehh, hold up, I need to add a pile of negative prompts first...