I saw this bunny in a store window.

     In art, a rabbit is the symbol for reproduction.

     Meanwhile, in the online video game 'Age of Conan', it often shows a wolf devouring a rabbit.  That is a symbol for copulation.

     Here is the latest Animal Stack.  It was created by Marco The Finn...

     The second picture has an added little dinosaur on top.

Animal Stacking with Iron Man

      A friend of mine decided to stack on top of Iron Man.

      haha.

     In the comics, Tony Stark was an alcoholic for a while there, so it is appropriate that he would get stacked on.