I struggle with words too. Writing is better for me, I have more time, I can edit my message before sending and sometimes after sending. But sometimes writing some e-mails is for me too difficult.
When I speak, it is for me as translating into other language. I can't fint right words and often I don't know, how tell it, or I dont know, what people want to hear. It is hard for me someone something explain, this is better, when I can show it. When subject is really emotionally, I can't speak.
I really dont know, what do with this.
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Sorry for my bad english. English isn't my native language.