My husband, several girlfriends, and a few thousand of my favorite sex partners, I mean clients, are the only ones who know what I really do. I too enjoy surprising complete strangers by telling them my career, but I always say it in a way where they can't tell if I'm joking. Got to keep them guessing, although I've met a few cute future clients this way on trains, in bars, etc. I'm always careful to ensure they initiate further contact for legal, safety, and sanity reasons.