A libido post was a life-sized wooden sculpture used by Caitians to relieve their annual need to have sex. Ensign Beckett Mariner jokingly called it "an important cultural sex toy from the past."
Doctor T'Ana owned an old libido post stored inside a wooden box that she kept at a storage facility on Qualor II. In 2381, she ordered Ensign D'Vana Tendi to retrieve her "family heirloom". Upon learning of what was inside, Tendi revealed she knew what it was and explained its purpose to Mariner. However, Tendi and Mariner accidentally broke the head off the post, and their attempts to have it fixed at Starbase Earhart and an Orion Pirate Outpost only worsened the damage. After they returned to the USS Cerritos, T'Ana revealed that she did not care about the post, and instead actually wanted the box. (LD: "We'll Always Have Tom Paris")