sexualized body part, not lewd
Preceding sentences, for context that makes the whole situation bad: "In 2005, three staff at The Gorilla Foundation, where Koko resided, filed lawsuits against the organization, alleging that they were pressured to reveal their nipples to Koko by the organization's executive director, among other violations of labor law. The lawsuits were settled out of court."
Mastodon is a server for a federated social network: everyone can run a server if they want to, including me. So this is a Mastodon server for me (Vierkantor) and my friends.