I have been rather put to it in the past few days to try and get across to my children (born in '84 and '85) the significance of the term "Deep Throat". Their primary acquaintanceship with it is from the X-Files. I don't think they can fully appreciate all the connotations it has for those of us who lived (and watched) when the Watergate investigation was going on.

My own association of the term is with a rather more X-rated character than in the X-files. In my case, it comes from familiarity with the term from before Watergate.