We actually agree on the first thing as well. You are totally right. This is something I have often thought about. People don't know you when you meet them for the first time. They don't know your past and all the insecurities you had. So the best thing is just to pretend it never happened.
What I was just saying with what I wrote is that so many people will chicken out and say "that's just not the kind of person I am" or "that's not me" when it comes to approaching women and being an interesting person. They'll feel as if they're not themselves when they are doing these things, but how do you know what your true self is? You weren't born the way you are now. You made experiences and those experiences changed you. No one can tell you who or what you are. You can be whatever you want. So that basically is the same as what you said.
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I already am a PUA.