It's about a skunk who won't commit and leaves multiple women. Pretty lyrics, great tune, excellent singing and musicianship.
Here's a Johnny Cash version which is also good: Gentle on My Mind.
Four years later he came by Philly, and we had lunch along with a reporter from the "Philadelphia Inquirer." I schooled the reporter on other songs Hartford had written, such as "California Earthquake." John said, "Don't make light of 'Gentle.' It bought me a whole slew of apartment buildings in L.A."