Guy asked a dumb question?

I'm an alumni of the university where the guy I ve been on a few dates with, is currently studying as a doctoral student.
I have the library access card while he has the research student card. The research student card is dark green while library access card is also green. We know each other so he knows I have library access.

when we both swiped our cards , he asked me why do you have a research card. I felt a bit weird because he knows I am not a doctoral student but I showed him my card anyway.

Was this a dumb question on his part or did he intentionally ask this to see my card?
Guy asked a dumb question?
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