Do women use laughing as a flirt technique or are they genuinely laughing cause it's funny?

Or both? Is laughing a strategy? I ran into a post of a meme of a girl staring down another girl and the posts said "when a girl laughs talking to your boyfriend but you know your boyfriend isn't that funny?" And my brain just went like 🤯
Do women use laughing as a flirt technique or are they genuinely laughing cause it's funny?
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