Ex MA Hole
It isn't the cost of any one particular item, it is the cost of ALL of them. No, one pocketbook shouldn't cost much (then again, some idjits DO spend $400 or more for one), but she's likely to buy 5 of them for every wallet you buy.
How much do you spend on cologne and shaving gear vs. what she spends on make-up and perfume?
How much do you spend on jewelry for yourself, vs. how much gets spent on jewelry for her?
How much do her hair care and nail care cost, vs. the simple and cheap haircuts that you probably get 8-10 times/year?
Don't be a girlie-man, FORCE her to be more rational (in a nice way, of course - you do want to sleep in the same bed
). Do this by saying: "OK, baby, I know how to settle this argument without more fights. We're each going to write down what we spend on the following, and compare at the end of one year. Whoever spends more loses the right to complain. Include clothing, hair care, nail care, clothing accessories, shoes of all types, make-up and perfume/cologne, shaving gear (and, YES, she spends money on razors and cream also - or at least I hope she does
), jewelry expenditures (though modified so that if you buy her a necklace or whatever, it goes into HER column), and guns + accessories. Total it up and let the figures do your talking.
With any luck, shortly thereafter, you can let your M-1 do your talking!