How many times do you have to shave your pits before it stops burning like a forest fire?

I tried it once about 10 years ago and it was fine until I got to work and started sweating a lot! WOW!! Did that burn!! I told a girl friend of mine and she kinda smirked and said, "You get used to it.".
How many times do you have to shave your pits before it stops burning like a forest fire?
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