What hides this stereogram?

A bunch of Indians capture a cowboy and bring him back to their camp to meet the chief. The chief says to the cowboy, "You going to die. But we sorry for you, so give you one wish a day for three days. On sundown of third day, you die. What is first wish?"
The cowboy thinks for a moment and then responds, "I want to see my horse." The Indians get his horse. The cowboy grabs the horse's ear and whispers something, then slaps the horse on the ass. The horse takes off.
Two hours later, the horse comes back with a naked blonde. She jumps off the horse and goes into the teepee with the cowboy. The Indians look at each other, figuring, "Typical white man - can only think of one thing."
The second day, the chief says, "What your wish today?"
The cowboy says, "I want to see my horse again." The Indians bring him his horse. The cowboy leans over to the horse and whispers something in the horses ear, then slaps it on the ass.
Two hours later, the horse comes back with a naked redhead. She gets off and goes in the teepee with the cowboy. The Indians shake their heads, figuring, "Typical white man - going to die tomorrow and can only think of one thing."
The last day comes, and the chief says, "This your last wish, white man. What you want?"
The cowboy says, "I want to see my horse again." The Indians bring him his horse.
The cowboy grabs the horse by both ears, twists them hard and yells, "Read my lips! POSSE, dammit! P-O-S-S-E!"