Because, you know, she has a vagina which means she's just like every other woman on earth. No, she doesn't like it when I spend money on her, especially if it's just something like jewelry.
Our relationship works like this: I state the dos and don'ts, she obeys them, and in return I comply to what she wants. If she forgets up, the situation fixes itself quickly because as it gets worse for me, it becomes worse for her. She doesn't want a bunch of clothes and jewelry because not only am I enough for her but the money would be more sensibly spent on important things like food.