OK.. this is an old one... REALLY OLD.
Remember that this joke takes time in the early 50's.
One family was having a picnic in the great outdoors. Suddenly their pocket-radio started an announcment:
"Attention! The earth is being invaded by aliens from mars. They seem to have big heads, short legs, long arms and big poppy eyes. Be alert and if you see one, try communicating to it! DO NOT offend the alien in any way!"
The family got scared but nothign hapened.. After a few minutes the father went in the nearest bush for a shit. And suddenly he saw the alien! Everything mached the description! The father remembered the anouncment about communicating with the aliens. He said:
"Greetings. I am Tom Smithsky. I come from New York. I am trying to have a shit."
The alien looked at him and replied:
"Hello... I'm Eddy Barkley.. I'm from New York and I'm having a shit..."
Good one, eh? Hope u understood my translation...