-Louise and Martine Fokkens are 70-year-old twins in Amsterdam, in the Netherlands.  They've both been working as PROSTITUTES in Amsterdam's legendary Red Light District for 50 YEARS.

--And in that time, they've had sex with approximately 355,000 MEN.

--Let's break that down.  That's 177,500 men each, or 3,550 per year.  Assuming they take two weeks of vacation, that means they've each had sex with approximately 10 men a day, every day, for 50 years.

--But now, the Fokkens are RETIRING.  Louise says her arthritis makes sexual positions TOO PAINFUL . . . and Martine says she's having trouble getting new clients, she just keeps getting the same guys who like weekly S&M sessions.

--They won't say how much they've made as prostitutes in their careers.