Heres some info i found might help explain better
Bullfighting in Portugal traces its roots to ancient times, when Celts fought bulls in pagan festivals. Bullfighting in Portugal today is a snapshot of the 18th century, when a single event changed bullfighting forever.
The Portuguese bullfight is, at first glance, quite simple. A cavaleiro, or rider, dressed in a silk jacket embroidered with gold and lace, and wearing tan riding pants and black boots, takes to the arena atop the renowned Lusitano breed of horse. The Lusitano has a long history as a victor on the battlefields of Asia and