John Legend says to never forget what made you fall in love with your partner in the first instance.
The couple were together for 10 years before their marriage in 2013 and four years after that, they look so much in love, still look cute together, even with the long-awaited arrival of their baby Luna.
So how have they managed to shut boredom out?
The 'All Of Me' singer tells Buzzfeed UK during a chat that "I'm lucky I'm with a very exciting, dynamic woman.
If she wasn't, I don't know how easy it would be. But I am with someone who's funny and clever, and we get to travel a lot and do a lot of exciting things.
But I think you have to make some effort too – you can't just expect it to unfold that way. You need to go on dates, you need to do things that make you remember why you fell in love with each other in the first place."
And regardless of the sweetness we see of the couple on their Instagram, Twitter and Snapchat handles, they still have their moments of disagreements.
Obviously they always manage to find a way to resolve these issues.
The singer advises that the best way out of marital/relationship issues or disagreements is for men to apologise to their spouses.
He says, "Tell your wife that you're sorry and that she's right. That's the best way to resolve an argument, because she probably is right. And even if she isn't, just tell her that."
Now we know one more reason why John Legend and Chrissy always look so good together.