Michael Douglas flashes Catherine Zeta-Jones when playing golf

Michael Douglas revealed that his nearly 23-year marriage with Catherine Zeta-Jones is still hot and heavy — even on the green.

The couple regularly play golf together, and they have their own special penalties to keep it spicy.

“The rules are — I have to whip it out if I don’t hit it past the ladies’ tees, which I manage most of the time,” Douglas, 78, told The Guardian. “But there have been times when we’re playing alone, and have to give her a little show because we are competitive.”

The “Basic Instinct” and “Ant-Man” legend then claried: “But only when I play with my wife.”

Zeta-Jones, 53, previously let their erotic rule slip during an appearance on “The Graham Norton Show.”

“I’m pretty good, better than him and we have a bet that if he ducks a shot he has to drop his pants,” she said during the 2016 interview. 

The “Chicago” Oscar winner revealed that this is a bet she makes not just with her Oscar-winning husband — but with “any man” she plays against.

“There has been an issue with paparazzi so I make him go into the bushes. A deal is a deal,” Zeta-Jones quipped.

Douglas and Zeta-Jones have been married since November 2000 and they share two children: Dylan, 22, and Carys, 19. Douglas has another son, Cameron, 44, from a previous marriage to Diandra Luker.

The Hollywood stars often post romantic messages to each other on Instagram.

Douglas shared a black-and-white photo of them on Valentine’s Day with the caption, “Happy Valentine’s Day to my darling Catherine! I love you so much.”

In November, Zeta-Jones posted a sweet picture of them kissing for their anniversary.

“[Celebrating] 22 years and 1 day! It’s in the fine details … love you sweetheart. Happy Anniversary,” she wrote.