I don't recall anybody discussing this yesterday during PY's testimony.....The fact she said JY had 2 wedding bands (a dress one and a regular one). I've heard of women (wealthy, rich women with huge diamonds) doing that, but not men. And JY was a white collar worker, so it's not like he had to worry about doing construction work and damaging the ring. I thought that was a bit odd.
I don't think it's all that uncommon here. Most of the men in my circle (not wealthy) have two bands. My husband is the only one in our group that doesn't, and he's asked me for a dressier band. Usually a tungsten carbide or similar choice for daily wear, and a 14k or platinum for dress wear. Certainly not everyone, but it doesn't stick out as an oddity either.