well Brown eggs come from Brown Chickens..
The city-slicker went for a drive in the country. Came across a road stand selling watermelon. He came to a screeching halt - never having seen a watermelon before. (Well - not a whole one that hadn’t been cut into neat cubes!)
He asked the farmer what they were.
The farmer thought that was a dumb question.
“Why - they’re dinosaur eggs! You can have one for $50.”
This was a deal too good to be true. So the city-slicker used some twine the farmer gave him and strapped it to the little rack on the back of his fancy sports car.
20 miles down the road, the watermelon had finally worked it’s way loose and fell to the road. Another 2 miles and the city slicker realized his loss. Rushing back to find his lost prize - he found it - splattered all over the road and being eaten by the chickens from a nearby farm.
Seeing it opened up - he was furious at being hood-winked, he raced back to the stand and confronted the farmer. “I demand to have my $50 back - that was no dinosaur egg!!! It was just a lousy chicken egg!”