In his new memoir, American businessman Barry Diller makes some speculations in his first guess about his sexual behavior and his marriage to fashion designer Diane von Furstenberg.

Diller, chairman and senior director of international media company IAC, and chairman and senior director of American travel company Expedia Group, married Von Furstenberg in 2001. Although their romance began over 20 years ago, Diller wrote in an excerpt from his forthcoming memoir, “who knows.”

Diller, 83, said in an excerpt published Tuesday that he was interested only in men until he met Von Furstenberg when he was 33.

He said von Furstenberg was dismissive of him when he first met, but Diller said for the second time at a mutual friend’s dinner: “I was immediately bathed in such a concern and the warmth of comfort, and I could not believe it was the woman I was fired a year ago,” excerpted.

At that dinner, they talked alone on the sofa, Diller said: "There are sparkling sparks around us, and the French accurately described it as a coup De Foudre."

They had dinner in her apartment shortly afterwards, "Then, like the sofa the night before, we were tangled with each other, like teenagers, something I haven't done with a woman since I was 16."

Diller added: "Now, it always surprises me: no effort, no reason, no thing, no ambition, nothing. Apart from the excitement, I think, I think, this is a surprise! I certainly don't feel it! I certainly don't feel it, oh my god, what does it mean, what does it mean?

Before meeting with Von Furstenberg, Diller said he never made it public. He vowed that he would “stay silent, but not live hypocritically” and “will not do one thing that would make anyone believe that I live a straight life.”

As a result, when Diller and von Forstenberg became a couple, people noticed. At that time, he was Von Furstenberg, chairman of Paramount Pictures..

Diller wrote: "People start saying, 'Huh? What is this guy? We think he only likes men.'

But, “when we can’t get out of each other’s hands, most of the guess goes away.”

Diller wrote in his memoir that the couple dated for several years until they had an affair with actor Richard Gere in 1981 and separated in 1981. He said that Von Furstenberg re-entered his life ten years later, and ten years after that, they got married.

"I've lived for decades to read about Diane and me: About us being best friends, not lovers," Diller wrote. "We're not just friends. We're not just friends. Simple and simple, it's an explosion of passion, and it's been an interest for years. And, yes, I love men, but it doesn't conflict with my love for Diane."

Although the media speculated that Diller was gay or bisexual, he did not use any of these two words in the excerpt. In fact, he wrote that Europeans were “wiser” about sexual behavior, and today, “gender identity is smoother and more natural without all the strictly defined lanes of the last century.”

"I always think you never really know other people's relationships," he wrote. "But I do know our lives. It's the cornerstone of my life. Something that others can stimulate sometimes, but mostly annoy us. We know, our family knows, our friends know. The rest is bubble."