Don't know what this joke means

iku   Tue Feb 10, 2009 8:11 pm GMT
To the girls who have a boyfriend in a different area code ... you know the man-law about area codes right?
Jago   Tue Feb 10, 2009 9:41 pm GMT
There's a long standing un-written rule, saying that it's not considered cheating if you have two girlfriends or cheat on your girlfriend is the other one is in a different area code.
Jago   Tue Feb 10, 2009 9:49 pm GMT
I meant to say "IF the other one is in a different area code".
Bob Monkhouse   Wed Feb 11, 2009 2:55 pm GMT
HAHAHAHAHA Great Joke.