"Stolen Camel" joke

A man goes into a police station and the desk sargeant asks him what he
wants.
The man says, "Someone has stolen my camel, I went into a bar for one drink
and when I came out it was gone!"
"Now, sir, I think we have had more than one drink. Why don't you just go
home before you end up in a cell for being drunk and incapable," says the
sargeant.
The man pleads his innocence, "Listen, I am not drunk and my camel has
definitely been stolen. Please help me."
"Okay," says the policeman. "Let me have some details. Give me a desciption
of your camel."
"Thank you," the man says. "Well, it is a greyish brown colour, it's got two
humps, it is a male and it..."
"Hold on, not so fast. How do you know it is a male of the species?" the
sargeant enquired.
"Well," the man explained, "The other day I was riding it down the High
Street and two men were on the pavement and as I passed them one of the
men turned to his friend and said, 'Look at the prick on that camel!'"