Mike & Liza’s Family Feud: Sentimental Secrets

Dear Mike & Liza,

I was cleaning out the closet and put an old sweatshirt of my husband’s in the donate pile. He said I can’t throw it out because it has sentimental value. When I asked him what was sentimental about he refused to say. It’s really bugging me that I don’t know what it is. (Old girlfriend maybe?) I don’t think a husband and wife should have secrets. What should we do?
Deena, Ammon