79-year-old Michael Douglas admits to having a very indecent relationship with Catherine Zeta-Jones

79-year-old Michael Douglas admits to having a very indecent relationship with Catherine Zeta-Jones

While most big-name stars prefer to keep their mouths shut when it comes to their intimate antics, Michael Douglas is clearly spreading the word.

This week, the 79-year-old made a surprise admission about the rather drastic punishment his wife, Catherine Zeta-Jones, meted out to him after he lost to her in a game of golf.

Both are keen golfers. (Ross Kinnaird/Getty Images)

Although fans were initially shocked when the celebrity couple went public with their relationship in the ’90s – due to the actors’ staggering quarter-century age difference – their relationship appears to be getting stronger.

Age is just a number, because in the past 25 years, since the lovestruck duo tied the knot in a lavish ceremony at the exclusive Plaza Hotel in New York City, the couple has had two children together.

Since then, Douglas and Catherine have repeatedly opened up during interviews with the press and given fans a glimpse into what makes their relationship so special.

This Basic instinct the actor once said, “True love takes work. Love is an incredible feeling that comes from deep within, but you have to nurture it, you know.

“What I’ve learned about aging is that you can’t take love for granted. You protect it, you nurture it, and it grows, and after the initial physical, emotional aspects, it becomes deeper.”

The couple is now more in love than ever. (Axelle/Bauer-Griffin/FilmMagic)

And this week, as they say, Michael revealed how he and his 54-year-old wife motivate each other to keep going.

In a conversation with TV star Alyssa Farah Griffin this week, the actor shared his thoughts on the couple’s interest in playing golf together.

Asked what would happen if his Swansea-born wife won, he took his interviewer by surprise by revealing how she would punish him.

“What does she tell you to do when you lose to her?” the presenter asked.

And — without wasting any time — the New Jersey star replied: “Pull it out.”

Michael then elaborated: “(She says) ‘You’ve got to get it out. Get it down and get it out.'”

A visibly shocked Alyssa quipped in response, “That’s the secret of marriage,” to which Michael jokingly replied, “I’m going to be 80 in September, so now I’m playing from the ladies’ tees too, so I don’t have to do that anymore.”

Michael and Catherine are parents to 23-year-old son Dylan and 19-year-old daughter Carys, while the actor is also father to 45-year-old actor Cameron Douglas from his first marriage to Diandra Luker.