A professor once noticed that some students think it’s cool to be able to say, “I’m a math major.”
It’s easy, even, to say it truthfully because all you have to do is tell the registrar’s office that you want to be a math major and they tell The System to declare it so.
Then an advisor starts to talk about the classes you have to take and many of them are mathematics classes. But it’s still okay, because all you have to do is tell The System you want to register for those classes and barring any glitches about “lacking prerequisite classes” or “unpaid tuition,” you are listed as a student in a math class.
Then what happens?
You attend your first class and decide whether to join the ranks of Students of Mathematics.