Dan Savage is best known for writing, talking and giving advice about sex.
You may have heard him on our air, as a contributor to This American Life.
He grew up in Chicago, but now lives in Seattle with his husband Terry Miller and their son, DJ.
Aren't you wondering what he was up to at 25?
Dan spoke with WBEZ's Lauren Chooljian for the Year 25 series about being 25 and living in Berlin.
The year was 1989 - the same year the Wall came down.