I think this has been done before but I can't find it. It made for some funny reading as I recall. Here are the rules!
1. You can only add one sentence at a time to the story.
2. You should only read the last sentence which was written.
Ok, I'll start!
"In the middle of a very dark night, clouds darkened the moon's dim light.
Tom walked along the riverside wondering how his life had turned out this way..
as he was pondering he tripped and fell face first into some cow dung...
Getting up, wiping his face he turned around and saw the most amazing sight...
the bees knees
there she was in all her glory........
Daisy was staring lovingly down at him with her tail wagging in delight...
Then Daisy lifted her leg and pee'ed on his face...
'Bold dog' he said to daisy as he put her back on the lead..
For a moment he had almost forgotten what he was doing there.
When a sudden flash of lightning brought all those vivid memories flooding back.....