Men, please put extra effort into growing your self-esteem if you are struggling with it. Make sure your sense of self is tied to sentimental and real value NOT money.
Listen, if you feel your woman should not buy things you can't afford (if she has the money), or you believe in the school of thought that for her to buy it, she must somehow present in a way that makes you feel like you're the one paying, you've lost it.