Dude you better get use to it now there's no equality and there is a double standard in womens minds and we're always on the losing end.
But RT's comments contain alot of wisdom.
really the best way to do it is for the two of you to have your own accounts that contain funds that you individually control for your own purposes after all the bills and such are paid every month. Then you can buy your razors without guilt and she can do what she wants.