Guest: Maybe it's a cultural thing, but here in the UK I've never known any married men older than me
or my same age who wear wedding rings.

Newly-wedded men in their 20s / 30s may have recently started to accept this fashion;
but I can't help suspecting they are soft touch victims of the grossly profiteering Wedding Industry ???

I don't know how old you are, but I'm a Brit in my late 50s and wore a wedding ring for many years from the day I was married. I stopped wearing it regularly when I really got into rock-climbing and saw one guy get his finger "de-gloved" after he forgot to take his ring off and fell with his finger jammed in a crack in the rock. Having heard about more cases, I changed my "default setting" to "ring off" so that I won't be so used to it being there that I forget it.

Probably over half the men of my acquaintance in my age group got a wedding ring when they were married.

And it wasn't due to being a soft-touch victim on the wedding industry. Our wedding was Registry Office, with a meal for ourselves plus 10 family members only afterwards, and a self-organised party for friends at our flat in the evening. Cost, including 4 days honeymoon was under £200 all-in, in 1980. Most of our friends also had "budget" weddings, but the blokes mostly still had rings.