I knew this one too! ^^ You know why they made it red then? It's because of the blood that's spilt. That way it doesn't look as bad or so. I don't like bull fights.
Then why not just use a black cape... ? You could be right! I have no idea! I read somewhere they just go for the cape in bull fighting because it's moving?!
Stop me if i'm wrong.
In fact, men are like bulls because they run behind all ladies in red dresses...