Actor John Travolta says that that the secret behind the success of his marriage to his wife Kelly Preston is making a complex series of lists about their needs. Also, the two make sure they have enough time to spend together.
Contactmusic.com quoted him as saying: "We make lists of what we need and want from each other and check them regularly, we list everything from how much sex to what kind of food we want.
"It's so we can find out what the other needs and that we're going in the right direction. It doesn't sound romantic but it works for us."