Would you be willing to take an accurate lie detector test, if one existed, to prove to your spouse that you have never cheated or attempted to have sex or a romantic relationship with someone during your committed relationship? She is guaranteed to divorce you if you fail. This is the male version of paternity testing for men. Remember, she's not accusing you of infidelity. It's for her "peace of mind".

Edit: would you support a DNA database of men from birth that can only be used to accurately identify fathers and all children are tested.