Men don't want to advertise that they are asking for anything other than the "normal" cut when they visit the barbershop. It seems to be an unspoken rule, one that the barber knows very well. He knows exactly which celebrity hairstyle each man is quietly asking for and how to cut their hair accordingly.
Experiment: Finally, it is not a bad idea to experiment once in a while. Change is the way of life. Why keep a constant hairstyle throughout your life? Why not try something different? However, proper research must be done before experiment especially if you need to go out of your house quite regularly.