Girls, Why would she bring this up?

So I was just working away when one of my co-workers brought up the brand of my boxers... As I was doing paperwork and stuff she came over and said something like "Oh you're wearing Calvin Klein Boxers today and not Superdry" I just laughed and agreed as it had me really confused...

Any reason or why she would bring this up?

Girls, Why would she bring this up?
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