This is a conversation that took place between a  person(Y) in the public and a MBA marketing student(X).

 X: Which shaving cream do you use?

 Y: John's

X: Which aftershave do you use?

Y: John's

 X: Which deodorant do you use?

 Y: John's

 X: Which toothpaste do you use?

 Y: John's

 X: Which shampoo do you use?

 Y: John's

 X(Frustrated): O.k. tell me, What is this John? Is it an international brand???

Y: No, He is my roommate.