Why does my wife dislike me going commando and saying I ‘show’ too much?

My wife won't doesn't like me going commando im not sure why it just feels better than the restriction of underwear she says I am way to bulge and I show but I dont see it is this a woman thing where she can see what I can't?
Why does my wife dislike me going commando and saying I ‘show’ too much?
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