As I really think it's really not important why others choose to enjoy things I find questionable. That's a brick in their wall and to knock, or denigrate, their choice makes no sense to me.

As to Brass being a base metal, I find it an interesting alloy, historically and in it's uses today. The bactericidal properties are especially fascinating. It doesn't hurt that it's also used in ammunition cases, which to someone like me who has used firearms daily for almost 40 years, makes it an old friend. But your mileage may vary, etc.