This script doesn't do search, but it generates keywords for images and places them in the image metadata. You can then search for keywords using something like Diffractor. I will warn though that any AI solution not geared towards NSFW will not give good information on NSFW images, though it may give a keyword such as 'intimate' or 'adult content' which is all you need.

* https://github.com/jabberjabberjabber/LLavaImageTagger/