I have no clue where that particular
picture comes from, but bull leaping is
a very old practice, like Crete, Minoan,
and few other old places. Some people
have speculated that it was carried to
Spain and devolved into bullfighting as
we know it today.
The Minoans, called the first advanced civilization of the European continent, were thought to have revered the bull. Crete was in such proximity to various volcanic sites, that earthquakes were a common occurrence. Historians believe that the sound of the rumbling earth was likened to the roaring or bellowing noises made by a giant bull who dwelt underground.
In fact, it’s believed that an exploding volcano on the nearby island of Thera (Santorini), caused a tsunami that devastated their shipping trade so thoroughly, that it led to their downfall.
A matriarchal society, Minoan women were depicted as tan-less ( http://upload.w...n.jpg ), whereas the men were shown with reddish tan skin. As you might notice in the “Knossos_fresco_women” photo in parenthesis above, the women apparently enjoyed baring their breasts, which can also be seen here: