Earlier quoted context omitted.
If I can finetune the model on my face and the model will be able to generate my nudes (even if there is no nude of mine in the dataset), then it can works easily with children too.
Do you understand that adult bodies and child bodies look different? Please show me a model trained on adult humans being fine tuned to generate a child human (fully clothed).
SD-based models can generate child bodies just fine, based on lots of training with non-porn images.
> Please show me a model trained on adult humans being fine tuned to generate a child human (fully clothed).
That's going to be hard in the SD space since there are, AFAIK, no models trained exclusively on adult humans (not even the base models), so you'd have to scratch-train a new base model to do this. (A model fine-tuned on adult images is still going to have the influence of base-model training, and unless massively overfit—usually very much an anti-goal, the exception being age-filter models whose entire focus is controlling apparent age [0]—will not have lost much of the generalization capability of the base model.)
The generalization abilities of models are good enough in other contexts that its plausible that realistic nude children could be generated by a model with no nude children in its training data that was otherwise trained on both clothed children and nude adults. I have no plans on testing this, however.
[0] e.g., https://civitai.com/models/65214?modelVersionId=74332