In the song, Grammer sings these words to a fictional temptress with a good butt: "Nah, honey I'm good. I could have another but I probably should not; I've got somebody at home, and if I stay I might not leave alone."
Grammer and his team posted a music video for the song to YouTube last week, which features more than 100 real-life couples -- crowdsourced via social media -- who have been together anywhere from several months to more than 70 years.
"As a guy who's out on tour a lot and there's lots of cute girls all over the country, to just deny that that's real would not be true," he told The Huffington Post. "So I wanted to make an honest, true song about staying with somebody and in the end enjoying it. It's like the best decision."
"I think that when you watch the video and you see people that have been together for 40, 50, 60 years -- and that end little butt-grab by the couple of 70 years -- it reminds you of that thing. That there is something really special and noble about staying together," Grammer said.
Watch the video above but be forewarned: the feel-good song will get stuck in your head.