Why do Girls mark Facebook messages as "Unread"?

Anonymous
I notice this a lot with certain friends on FB, I don't get why they are doing this - they read the message and then mark it as unread to act like they never read it or something... is it because they want a reminder to respond back later or to give off the impression that they don't care about you enough to read your message?

Do any of you do this?

If so, why?

Why do Girls mark Facebook messages as


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+1 y
And not a single fuck was given for this question...
Why do Girls mark Facebook messages as "Unread"?
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