"Bicycles" joke

Here's one...
There was this priest who wanted to "spread the good word" in areas
where need was greatest. He thought that the best place to start was
in Africa. So off he went.
He went into a deep jungle, and found a tribe. In his haste, he
forgot that he would have to teach these people English first. So,
he selected what he thought was the smartest of the tribesmen and
began his teaching.
They went for long walks in the jungle, first the priest would point
to a rock and say, "Rock." And the native would say "bagwundame."
And the priest would repeat "Rock," and the native would say "roock."
Then priest would point and say "tree," native would say "tree,"
and so on-Until the native had a minor understanding of English.
It was on one of these "nature walks" that the pair stumbled upon a
clearing, and on the other edge of the clearing was a young couple
making love.
Well, this embarrassed the priest, and as he turned to leave the
tribesman asked, "What they do?"
The priest, being flustered, said, "UUUhhh, why, they're uh, uh, mmm,
Fuc.. er no they're scre...*er* mmmaking whoop... cough THEY RIDE BICYCLE!"
He figured, hey, this guy's never gonna see a bicycle anyway...so...
Instantly, the native whips out a blowgun and shoots both lovers dead
on the spot. The priest is outraged!
"WHAT DID YOU DO THAT FOR? THAT'S THE MOST BEAUTIFUL THING ANY TWO
PEOPLE CAN DO! WHY???" cried the Priest.
The native answered simply, "He ride MY bicycle."