Two Line Jokes for a Picnic

We just ran across a webpage with several two line jokes on it.  These jokes can be told at any picnic and covers a wide range of topics.  Ranging from nature, human rights, feminists, senior citizens, scientists, international, and others.  While the webpage says it will make you the life of the party some of the jokes are better than others.  Which one do you like the best?  Do you think any of them are not funny?  Do you think any of them are funny.  Let us know after reading it!