YouTube has banned videos of animals and humans breeding if the video is intended to be sexually provocative. Nudity and sexual content can be allowed in some circumstances, such as if the content is intended for educational, scientific or other non-graphic purposes.
In some cases where sexual content is not explicitly banned, YouTube often places age restrictions on the video to prevent minors from gaining access to adult content. YouTube suggests providing context in the title and description of the video if the primary purpose of the video is legitimate. Content that is sexually explicit by its very nature, such as pornography, is never permitted.