By Debbie Emery - Breaking Celebrity News 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