Sadly, it is a challenge to train or generate a piercing on nipple, clit, since the piercing always pollute the shapes of them. As you can see in generated examples, usually no nipples but only areole. I also try other similar models, they also don´t work that good.

I cannot resolve these: no nipples but only areole, triple nipples, overfit,

Training details see training notes below. Give me some suggestions.

Example prompts: nipple piercing,