Keep in mind I said many, not all, but based on the conversations I had with older people in the Czech Republic when I lived there for a year I'm pretty sure it

Keep in mind I said many, not all, but based on the conversations I had with older people in the Czech Republic when I lived there for a year I'm pretty sure it's a real thing. It's also good to keep in mind that when you get most of your information from people who chose to leave the selection bias is rather high/peculiar.