Man gets sent to prison, come the first meal break some one says "142" and everybody laughs. Soon after, another bloke says "19" and everybody laughs again.This goes on for a while and the new inmate turns to the man beside him and says "What's going on? Why is everybody laughing at numbers?"
His fellow inmate says "Oh that? They're jokes. It's just that we've all been her so long that we numbered them instead of telling the whole thing to save time."
"Oh, right. Would anybody mind if I joined in?"
"No not all. Go right ahead".
So our friend takes a deep breath and says "259". To his great surprise, the whole table falls about laughing harder than ever.
So he says "Well, that went down well".
"Yes" came the reply. "We hadn't heard that one before..."