Not bullshit. The double bladed safety razor, as we know it, was invented by KC Gillette in 1901 and he was granted the patent in 1906. This also included a disposable blade which would be discarded after both sides of the blade had been used. Gillette also won the contract to supply said razor to US troops during World War I, issuing 3.5 million razors and 32 million razor blades. Razors before this were often the cut throat (single blade variety) which still needed the leather strap to strop and hone the blade.
I'm guessing these are bullshit. For one thing was this shot in something close to 1080? They had great picture on this camera but couldn't get color together. Another is there was no safety razor back then she's taking a straight blade to the vag. I'm calling bullshit.