The Coyote loves pranks, and one day it stole the important tobacco of the Sun.
The Sun was of course angry with that, and couldn't help but chase the Coyote.
The Coyote loves pranks but is weak, so he could not help but run from east to west.
The dropped tobacco sprouted, its flowers bloomed and its fruits ripened.
By the way, the Sun gave up trying to chase the Coyote.
The Coyote did not give tobacco to humans, but only shared it when offered a bride.
Well, that bride was actually a young man in disguise and Coyote howled in regret when he knew, but that is how we all got tobacco to smoke!