A porn search engine is a porn website that finds porn webpages that match a web search query. A porn search engine works similarly to a standard search engine such as Google but will only index porn-related webpages. A porn search engine can be beneficial in finding niche topics and lesser-known content which may be harder to find in a typical search engine like Google. A porn search engine may also index content that you otherwise couldn’t find in a standard search engine like Google where it may not be indexed at all due to quality standards or other issues.
Unlike a porn tube site, typically you are not able to upload your images or video content to a porn search engine; they are for finding porn-related websites and webpages only. There is no Google equivalent of a porn search engine; however, some of the most popular ones include Noodlemagazine, Tubesafari, Nudevista, Mat6Tube, and PornMD.