Well, the word deep fake is literally from the ai boom, but I understand you to mean doctored images to make it look like someone was doing a porn when they didn't was already a thing.

And yeah, it very much was. But unless you were already a high profile individual like a popular celebrity, or mayyybe if you happened to be attractive to the one guy making them, they didn't tend to get made of you, and certainly not well. Now, anyone with a crush and a photo of you can make your face and a pretty decent approximation of your naked body move around and make noises while doing the nasty. And they can do it many orders of magnitude faster and with less skill than before.

So no, you don't need ai for it to exist and be somewhat problematic, but ai makes it much more problematic.