I'm in my 50s and British and I've only had it done once: by the police when the house I was living in got burgled and they wanted to rule out our finger prints

I'm in my 50s and British and I've only had it done once: by the police when the house I was living in got burgled and they wanted to rule out our finger prints. It was 30 years ago and I imagine I could have refused. I didn't really think about it at the time.