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What are some tips for getting your first Brazilian wax? - brazilian wax jobs pictures

I get a job more in Brazil, but had never seen a case before. I usually shave, but my skin is also irritated. In addition to the fear that shitless, I wonder:
- How long the hair should grow up to?
- How long does the redness (I have) very sensitive skin?
- How long will take the pain / discomfort?