Both my husband and my son have plain wedding bands. When I got married I asked my husband if he would like to get a band with stones that were similar to those on my wedding rings and he absolutely did not. My son told his wife the same thing. I don't know if it has to do with being worried a stone will get lost at work or if they just do not think diamonds on a man's wedding band looks masculine. This is just something I have always been curious about.