What we really want is to get to know them. Instead, the film too-aptly reflects life in their line of work: brief interludes rather than intimate soul-baring. That's a shame, since there can't be that many 70-year-old identical twin prostitutes with a 50-year history in the business.
Why the sisters felt that prostitution was their best alternative remains unclear, either because they aren't interested in revealing that part of themselves, or the filmmakers didn't know how to get them to talk. Or maybe Ms. Provaas and Mr. Schroder weren't interested, for political or personal reasons, in making what, despite the laughter, they ended up with: another sad story about whores.