This guy is in about to cross the Sahara.

He asked the salesman how much this particular camel cost.

"200 dollars, and he is a very fast camel."

"Don't you have anything less expensive?", he asked, checking his wallet.

"Well, this camel is very cheep, only 50 dollars, and is very fast as well. Only one trouble; camel is very horny. If camel stops, you have to jack him off before he will go again."

"Well, I guess that'll do", said the man, and forked over the $50.

Later, the man is tearing across the desert on the camel, dust flying up behind, when the camel screeches to a halt.

The man gets off the camel, looks the beast in the eye, and makes a jack-off motion with his wrist. The camel nods in approval.

The man jacks off the camel, and gets back on.

The camel takes off again, at an incredible speed. 

Dust flying, wind whistling, the man has to shield his eyes.

The camel stops.

Man gets off, looks at the camel, and makes the motion, camel nods.

He reluctantly does his thing to the camel, gets on, and they take off again.

Now the camel is going faster than the man can imagine, hoofs pounding on the ground like thunder, birds thrown to the ground from the draft of the passing camel, and the city the man is headed for is just on the horizon when the camel plows his hoofs into the ground and stops dead, throwing the man forward off the camel.

The man sighs, looks at the camel, and makes the jack-off motion.

The camel shakes his head, purses his lips, and blows.