By Debbie Emery - Radar Reporter
After a storied 50 years in the sex industry, the oldest prostitutes in Amsterdam have knocked up more than their fair share of notches on the bedpost.
Identical twins Louise and Martine Fokkens, 70, shocked the hosts of UK talk show This Morning on Tuesday when they revealed they have serviced more than 355,000 men during half a decade working in Holland's notorious red-light district.
"You must have very strong hip joints, you're saying that you have problems with your arthritis!" exclaimed anchor Phillip Schofield, referring to the ailment that forced Louise into retirement two years ago, while her sister still works the window.
As RadarOnline.com previously reported, the women are now swapping the brothel scene for the bigscreen with an autobiographical film ironically titled Meet The Fokkens, and a book about their lives that is set for release next month.
The twins explained to Schofield and his co-host, Holly Willoughby, that while their clients are all different ages, "They grow with you… a lot of friends," said the Dutch sisters almost simultaneously.
The Fokkens also revealed how the industry has changed since they first began selling their bodies in the 1960s. "It is very different now. We used to sit in the windows with clothes on, today they are totally naked," said Louise, who became a prostitute at age 20 when she couldn't earn enough money making lampshades.
"My husband's friends said it was the best way to make money so we decided to find out. At first it was a problem for our mother and father but later we all lived normally with it."
While Martine still can't afford to retire from the world's oldest profession, the pair are hoping that their eye-opening memoir will rake in enough money to turn the red light off for good.
"We have written about our life for over 50 years in the industry. It is our side of the story," they explained.
You can watch a video clip of their interview at the MailOnline.