Cockfighting
With perversion as the defining feature throughout all of Sportsdom, is it any wonder that men raise their cocks, stick them in a pit and get extremely excited as the creatures bite and claw each other to death. Bull fights and dog fights are somewhat understandable, but why on earth would anyone be interested in a cock fight? The answer is simple: Because they are the most deprived people in the world.
Men who breed cocks for fighting, and cockfight spectators all suffer from impotence or erectile dysfunction. They are very concerned about their loss of manhood, and the ridicule that accompanies such a reputation. So they try to show off their cock power the only way they can.
But because they're just stupid folk from the backwoods they don't realize that cock fighting only draws attention to their sexual disability. Closer examination of the average cock fighter reveals that they are sadistic degenerates. Their unforgivable atrocities are heinous crimes against animanity. If captured they will be summarily tortured and euthanized by the Humane Society and the SPCA.