Yes, serious. I mean what purpose does each respective handlebar type fulfill? I know risers are used on mountain bikes, but why are they used. Also, what are bullhorns for? Variety? Looks? I understand drops are supposed to be more aerodynamic, but is that their only purpose? What sparked the invention of these different kinds of handlebars? I want to know why certain types of handlebars have the geometry they do. Was it entirely random, and people just made different types of handlebars because they could?