Why do some Geminis get very angry when you catch them in a lie?

I couldn't say why, but it's an interesting thing to discuss. All my best friends have always been geminis. (I am a pisces sun). As it always says everywhere, pisces and gemini's are drawn to each other like "moths to a flame". In my case, it's 100% true, and I'm proud of it. But anyway, you can expect anything from a gemini, and that's what I love about them. They VERY rarely hold grudges, even when they do get angry. I suppose that a gemini wants to be taken seriously, and wants to make an impression. Being told that they're liars probably doesn't sit with them too well. Did you know that virgos and gemini's are ruled by the same planet? Maybe some perfectionist virgo qualities come off in a gemini. Who knows? It's a mystery. ^_^