Google’s John Mueller said that he does not believe that rich results would work in Google Search for adult oriented web sites. But if you read the guidelines for rich results, only the critic review and product rich results specifically say adult web sites are not allowed, the rest, there is no mention of it.

At the 1 hour 6 minute and 35 second mark into a Google SEO hangout from December 11th, John was asked if rich results work on adult web sites. The question was:

John responded that he does not believe rich results work on adult web sites. I did not check myself… John said at the 1:07:12 mark:

The rich result guidelines do not mention any adult related topics. But if you drill through each specific rich result type, only two mention that adult is disallowed. The critic review rich result guidelines say “Don’t add critic review structured data for adult-related products or services.” The product rich result guidelines say “Adult-related products are not supported.”

As Lily Ray pointed out also on Twitter, the main guidelines do not say anything about no adult content.

Here is the video embed at the start time, where the question was asked:

Again, I did not dig through the search results to find rich results that show up on adult oriented sites. But some of you might know if it is much harder for adult sites, where Google labels the site with the SafeSerch filter, can show rich results in the search results.

Forum discussion at Twitter.