Why do guys find it hilarious when a girl gets angry?

Why do guys find it hilarious and cute when a girl gets angry/frustrated?

I mean the girl could be getting really annoyed and riled up and yet a guy would be laughing and not taking her serious and say something like ` you look so cute when you get angry` and to some it` s even a turn on.

Sometimes I try to be serious and all with guys when I get angry and they just find it so funny and never take me seriously. Why?
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Why do guys find it hilarious when a girl gets angry?
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