Gift for the wife

My wife and I agreed years ago that we wouldn't buy/exchange gifts for each other. I buy what I want/need all year without questions/explanations and she can do the same. Never received anything that I had to exchange and same for her. Works great for our marriage.
I try to do the same but she breaks the rules then its like I'm in a valentines day situation. you know the rule about Valentines day "when a woman says dont get me anything for valentines day, dont beleive it..." :)