Orgy

John Hart invited the Torchwood Three team to have an orgy with him. (TV: Kiss Kiss, Bang Bang)

Odysseus felt as nervous as "a Bacchante at her first orgy." (TV: The Myth Makers)

Charlotte Pollard once attended an orgy, though she did not stay. (AUDIO: Seasons of Fear)

Tyler Steele went to an orgy in Roath where he was banged by a dozen men. (AUDIO: Night Watch, Hostile Environment)

Behind the scenes
Speaking in regards to the Doctor's sexuality, Eleventh Doctor actor Matt Smith stated "The Doc’s idea of an orgy is playing chess with an ostrich. His brain doesn’t work in that way. He would find it (sex) weird and peculiar. He finds women peculiar. He is quite asexual.”