Men dye their hair for two reasons: Twisted Low Pony. The longer your hair is, the thicker the bun will be. The model in the picture above is sporting a platinum blonde color and a cool side-swept undercut. Undone Bun. This is a cool haircut idea for guys with curly hair. The result is this grungy style that is totally on-trend. The best male haircuts are all about shape. Itachi long hairstyle.