Dave comes home from the bar, drunkest he's been in a long time, and collapses into bed next to his sleeping wife. Later, he's woken by a brilliant flash of light at the end of his bed, which his still sleeping wife seems oblivious to. St. Peter appears in all his glory, standing over the two of them.
"You have died my son, of alcohol poisoning" says St. Peter. Dave is obviously distraught and begs and pleads with the saint to be given another chance at life.
"Well..." says St. Peter, thumbing through his saintly handbook, "There is a little known rule which might help. Apparently you can be reincarnated in special circumstances if you wish, but only as a dog or as a chicken I'm afraid.." Dave, living next door to a chicken farm, agrees to be reincarnated as a chicken, at least so he can still see his wife.
BOOM, the man is suddenly now a chicken, pecking around the chicken farm. A rooster approaches him and says "Hey! You must be the new arrival here! How's everything going?" "Pretty good" says Dave, "though my stomach feels a bit funny.." "Well you're obviously about to lay an egg! Give it a try; push one out!" So Dave wriggles and squirms and wriggles and squirms and out pops a nice egg!
"That felt great!" thinks Dave, "I think I'll lay another one!" So again he wriggles and squirms and wriggles and squirms and then !!BANG!! His wife angrily slaps him on the back of his head and screams in a rage: "For Christ's sake David!! You've shit the bed again!!!"