Man.. I am sitting here with my wife right now.. We are watching Shrek 2.. I find it very funny that I stumbled upon this post because I was just asking myself the same question... The only advice that I can give you is this:.. Tomorrow, take your wife to the "melting pot", she will enjoy it.. So as I type this and you read this, I promise that I will take you to the melting pot... We will enjoy ourselves.... Thanks.
Basically you can only reason with her so many time. You might want to talk to some one else or a thearpist for additional. Help