We don't. We never have. Usually we're on the same page though. We know how much money we have and how much we can afford to spend. However, I've been saving for our anniversary so I spent more then I feel that he will. Not that I care, I just don't want him to feel bad about it. This is why people set limits.

Do you set money limits with your SO for gifts? If you don't, how do you know how much to spend?