Maybe Girl-GAF can help me solve this timeless mystery. I'll never understand it. It's basically reflexive, because every woman I ever ask about this claims to not realize they are doing it.
This behavior seems to occur in woman of all ethnicities, cultural backgrounds, age groups, and social status. Even the most beautiful, outgoing woman with a killer smile and perfect teeth will reflexively cover her mouth/facing when laughing hard. Conversely, I hardly ever see men do this when laughing.
GAF, help me answer this incredibly important question!