Los Angeles: Singer Dolly Parton says the secret behind her happy marriage with husband Carl Thomas Dean is that they do not have any children.
"Mutual respect, shared interests and the fact that I stay gone a long time! Not having children together, and not having money problems has probably helped," contactmusic.com quoted the 66-year-old as saying.
"A lot of the pressures that cause couples trouble are just things we never had to go through," she added.
Although, Parton has no children of her own, she is the godmother of singer Miley Cyrus and has partially raised her siblings with Dean`s support.