Yes, I picked this photo out of BoingBoing Gadget's fantastic illustrated history of transoceanic cable because it was the most obvious penis joke. This coaxial tube carried over 90,000 telephone calls simultaneously.
Also worth peeking at—the underseas cable system in 1901 versus today: Cable day at BoingBoing Gadgets, it's pretty excellent. If nothing else, you should find out whether or not your wives really do boff the cable guy. [BoingBoing Gadgets]