With a Great Penis Comes Great Responsibility

In France, they take a d*ck joke and make it art.  Oath of the Horatii?  D*ck joke.  Art.  Eiffel Tower?  D*ck joke.  Art.  Slam dunk.  World War II?  D*ck joke.  Art.  (You have to think about this one.)

Now there is a new arty-like short film from French people that is also a  joke of a sort.  Can you guess what the punchline is? 

It has to do with a d*ck.  It has to with how having the best d*ck in the world can seem like a blessing.  But is it?