I may have figured out a loophole for you married guys to buy whatever you want. Or this may be a long standing practice. I have never been married long enough to find out.

Just left your wife do the same thing!

When she complains about you buying a new guitar, just point to the dining room table that seats 10 that she bought even though you haven't had dinner guests in 9 years. Or mention the membership to the gym she can't even find with GPS. Or the Wedgewood china set for 8 that has never been out of the cupboard.

That should settle it!