Some comments after reading through the posts in this thread:
We could have some "wife cards" printed up and use them like Monopoly get-out-of-jail-free cards.
Unless you live in a hole in the side of a mountain of rock, please stop calling it a "man cave".
Discussing major purchases with your wife before buying sounds reasonable and considerate, but in some marriages only amounts to an opportunity for her to veto or forbid you from buying something. To be fair, this usually happens after you have already accumulated a lot of expensive stuff, as in: "What do you need another pinball game for? You already have (X-many)!" I currently own 16 pins, 9 electric guitars, 5 cars, an 80-inch TV and various other stuff. My wife firmly believes I don't need any more of anything.