PG-13 rated stuff below.
A friend has been asking me for months if I could find out the origins of the word "dildo." I'm not sure why he wants to know, since the topic came up along with asking what "e.g." stood for (exempli gratia, in case you were wondering); perhaps he's been having an affair with a philologist. The OED lists the origin as "obscure," with the earliest example of the word being 1610, suggesting that the origins are in the Early Modern era.
Without getting too puerile, does anyone out there know more about the origins of this word?