To discuss work, especially of a technical, jargon - filled nature.

talking about work outside of work

(n.) a place where discussion is all that happens, and nothing actually comes out of it. The origin is the League of Nations, precursor to the United nations. The League had no armed forces, and no decisions could be enforced.

To talk about sex: including ones experiences, partners, anatomy, ect.

Revealing preferences of a personal nature (sexual fetishes, for example) or other deep, dark secrets in conversation with a relative acquaintance.