A barber tells members of a Senate subcommittee that regulation is necessary, citing a case he’d heard where someone contracted HIV after he was cut with an unclean razor while getting a shave in a barbershop.
In reality, though, this would be a highly improbable event, as studies have shown that the razor in question would have to have fresh blood on it from an HIV-positive individual, and the blood would have to be in a large enough quantity to pass the HIV virus on to someone else, an event unlikely with a razor.
https://www.youtube.com/watch?v=YVMeY3w7D70