Some countries forbid child porn even if no child was involved, it does not need to be real to be illegal. I assume so one can't say it was assumed to be fake b

Some countries forbid child porn even if no child was involved, it does not need to be real to be illegal. I assume so one can't say it was assumed to be fake but it wasn't. The lines get blurry when you generate porn with keywords like 18. Can you guarantee a legal training set of images? What if some actors look younger than they actually are? How will this affect the results? How do you proof the age of a person which doesn't exist based on one image?