When Einstein was traveling to lecture in Spain, He questioned a conductor again and again: “It may be a while,” He asked with a smile, “But when does Madrid reach this train?”
A TCP packet walks into a bar, and says to the barman "Hello, I'd like a beer." The barman replies "Hello, you'd like a beer?" "Yes," replies the TCP packet, "I'd like a beer." I'd tell you my UDP packet joke, but I'm not sure you'd get it.