The teacher of the earth science class was lecturing on map reading.

After explaining about latitude, longitude, degrees and minutes the teacher asked,

"Suppose I asked you to meet me for lunch at 23 degrees, 4 minutes north latitude and 45 degrees, 15 minutes east longitude . . .?"

After a confused silence, a voice volunteered,

"I guess you’d be eating alone."

http://www.cybersalt.org/cleanlaugh