Is this a generational thing?
My parents in their late 60's only shower once a week.
I wouldn't say they ever smell or look scruffy, but I find it odd.
I've obviously not lived at home in 15+ years so never really noticed before, but before lockdown we went away as a family for a week and they both showered once in that time.
Me, my DH and small kids shower or bath every day without fail.
They're both retired so it's not as if they're massively busy.
They're very house proud and everything is fresh and ironed and tidy.
I just don't get the showering thing.
But thinking about it when I lived at home I'd only shower a few times a week in my teens too. It's only since moving out I shower every day.