Fujisan

Fujisan is Japan's most sacred mountain.
In America, mountains are decidedly not sacred. You can blow their tops away to save a few bucks.
Here, instead, the horse is sacred. No one in California or Illinois is allowed to eat the sacred animal; and if you want to kill a horse, you have to put it in a bus to Guadalahara.

The national dress of the natives of El Norte are pants with "stove-pipe" leggings. Originally designed for riding horses, these curious garments are rather uncomfortable; they cut off the circulation which reduces sperm-production in the American male.
The last fact—the insufficient sperm count—produces feeble, imbecilic offspring, and explains the gradual stupefication of the citizenry.