The first reason is that women's clothes belong to a family's wealth. The more clothes a woman has, the better her fortune will be. Clothes must be put in the wardrobe, because only in this way can she prove that her fortune is left at home, so you have to buy some high-end wardrobes.
Moreover, if a woman has beautiful clothes, it proves that her family life is very rich, and this woman's life is also very happy, so outsiders will especially envy you. It is also for the unity of the family.
So when your girlfriend buys a lot of clothes, you should support her, because only in this way will she always be happier. In this way, the relationship between you two will become more and more tacit.