Sentence:  Bouilhet was just teasing, the outer edge of vivid male friendship: Gustave never committed a single homosexual act in all his life. He says he did, but that was boastful invention: Bouilhet asked for <WSD>salacities</WSD> from Cairo, and Flaubert provided them [in his letters]. 
Meaning of the word marked with <WSD> tags:  An act that is salacious, (lewd, obscene or bawdy); a salacious image or piece of writing.