In regards to you saying, "insults don't affect me", the correct use would be to use "effect".
English
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Sorry man, he's right and you're wrong. Effect is a noun, affect is a verb. Example: You want to affect the outcome of the elections, you only hope your lobbying has the desired effect.
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No, it wouldn't. He has the correct form
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I used affect as a verb. Affect as in having an influence on me. Effect as in having had an influence on me. This is the effect. This is affecting you.