SF predicts yet another new technological advance

[thatcrazycajun]

If you check your copy of I Will Fear No Evil by the late Robert A. Heinlein (one of my favorite novels of his, for reasons anyone who knows me well can probably guess upon reading it or hearing it synopsized), you will find that he anticipated this new device by at least three or four decades:
The P-Mate! (Insert your own puerile joke here; I ain't gonna.)