Thicke, whose wife Paula Patton gave birth to their first child, a son, earlier this year, said parenthood can be scary because it fills you with doubt.
"(I think), what am I gonna do? Am I gonna be a good dad, am I going to be able to provide for him?" he said Wednesday. "As a father you need to man up and try and get your life to together."
Not that that should be a problem for the platinum-selling R&B crooner, who released his fourth album last year.
Thicke said fatherhood will be one of the influences on his next CD, which is in the planning stages.
"I have so much to talk about with the baby now and all these new challenges in life, so a lot of the themes that I'm writing about are a lot bigger," he said, noting the economic and political upheaval in the country.
Though Thicke doesn't have a new album out, he's still performing: On Thursday, he's due to perform at a private concert for fans as part of Renaissance Hotel's kickoff to their RLife artist program, which gives fans a chance to connect with top musicians.
Thicke said it's important to connect with as many fans as possible.