Man becomes lost and disoriented in the desert... thinks he's going to die.
But then he finds a small inn and is able to crawl to it.
Inside he gets food and water... and recuperates in a couple of days.
Once he's feeling better, he goes down and asks the innkeeper:

"Where does a guy get any action around here?"

The innkeeper just shrugs and points to a camel tied nearby.
"That's disgusting!" the man thinks to himself... but stays quiet and goes upstairs.

A few days go by and guy's getting a little more desperate.
He goes downstairs and looks at the camel, but thinks:
"No way I'm doing that! I'm not THAT desperate."

Couple of weeks go by and the guy can't take it anymore.
He rushes downstairs... pulls down his pants... and begins humping the camel.
Innkeeper happens to walk by and the guy says to him...

"I'm doing it! I'm doing it!"

Innkeeper shrugs and says...

"Whatever. Most people just ride it into the town just over the hill."