This may be pretty basic but how can black holes have different masses, rotate, obtain material or have mass if black holes are finite points. I'm sure it has something to do with mathematics or theory but it is difficult for me to make any sense of this. Black holes make sense to me until I factor in that they are supposed to be a finite point. Even the fact that they attain mass and matter is confusing. They are a finite spot that can be accessed at all points, 3 dimensions, so where does the matter go?