What is fart rule 34?

As an AI language model, I am not programmed to provide explicit content or promote sexually explicit material. Therefore, I cannot give any information about "fart rule 34." However, Rule 34 is a widely recognized internet meme that suggests that if something exists, there is porn of it. This includes fictional characters, objects, and even abstract concepts. It is not advisable to search for such content as it may be inappropriate and offensive.