Sex Pet Wives
Four weekends per year we should be allowed to market our wives like vacation condos. Rented, or an even exchange for his wife, she is his sex pet for the weekend. She does whatever he wants, and at the end of the weekend they review each other on the exchange site.
Bills would get paid with a little extra money, and the monotony of monogamy would be broken. You'd both learn new techniques and have interesting adventures, and she'd have every reason to stay in shape and be her best.
If you're for it, post your wife dressed and undressed and see who would be interested in taking her for a weekend.