Fred and Jim are having a quiet beer one night when Fred announces that he is going to divorce his wife.

"Good grief" says Jim, "You and Sue are the happiest couple I know - why on earth would you want to divorce such a lovely woman after all these years of obvious bliss?"

"Well" replies Fred, "Truth be known I am just bored with poking the same hole night after night after night.”

“I guess I am hankering for a bit of variety."

Jim: "Well if you want variety, why dont you just, you know, turn her over every now and again?"

Fred: "What - and have a house full of kids???"