It's a taboo and edgy homoerotica tumblr. So on one end, it's safe in the sense that it is a legitimate website that does not advertise or encourage questionable links. On the other end, the content is graphic and unsuitable for children. That is obviously not the target audience. Tumblr already flagged the site as having adult content, so there are already base-level protections in place to prevent children from accessing the content.