Is it common for guys to not wear underwear?

Anonymous
My boyfriend told me he goes commando, at work, with friends, at home, sleeping, etc. Only when with me or he goes swimming or wants to hide his parts he wears underwear. Do a lot of guys do this? I was so surprised as I haven't heard of this and males in my family don't do this.
Is it common for guys to not wear underwear?
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