Three guys wandering a desert...

(submitted this as part of a contest so I thought I'd submit it here too, never submitted a joke before! Cheers!)

Three guys are wandering through a desert, hungry and thirsty and lost. At their wits end, they come across an oasis and rejoice. However, they have stumbled across an ancient tribe and are sentenced to die.
The big chief comes forward and says "You have walked upon our sacred land and the penalty is death. However, we will spare you if you go out into the desert and find 8 of the same fruit and bring them back to us"

The three guys look at each other and figure they better give it a crack, so off they go.

After a while, the first guy comes back holding 8 oranges. He looks expectantly to the big chief who says, "Very good, now... Put them up your bum".
The first guy cannot believe it, but obey he does and after squeezing in the 4th orange, he dies and goes to heaven.
He watches as the second guy then comes back holding 8 little cherries. He looks expectantly to the big chief who says, "Very good, now... Put them up your bum".
The second guy cannot believe it, but figures it should be pretty easy and starts sticking the cherries in one by one.
Without trouble he fits in all 8 cherries, big chief reaches out to shake his hand, and suddenly he falls to the ground and dies.
He appears in heaven next to first guy who looks astonished and says "You got all eight cherries in, why are you here?"
Second guy replies "Yeah I did, but then I died of a heart attack from laughing too hard"
First asks why and second replies-

"I saw the third guy coming back with Pineapples".