Are you actually asking?
The jist is that LLM find similar "chunks" out content from their training set, and assemble a response based on this similarity score (similar to your prompt request).
They know nothing they haven't seen before, and the nicely of them is they create new things from parts of their training data.
Obviously they are very impressive tools but the concern is you can easily take a model that's designed for porn, feed it pictures of someone you want to shame, and have it generate lifelike porn of a non porn actor.
That, and the line around "ethical" AI porn is blurry.