My town's population never changes. Every time a girl gets pregnant, a guy leaves town.
Why don't mexicans cross the border in groups of 3? Cause the sign says "No Trespassing"
A rooster ran across the border from the USA to Canada and laid an egg. Which country does that egg belong to?
Roosters don't lay eggs.
A flock of swallows were migrating south as a jet flew past them. "Why was that one flying so fast?" asked one. Another answers "Can't you see his tail is burning?"