How guys "flirt" with women in public places?

I recently had a massive "glow" up, and I am not very used to getting attention when going by myself to do personal activities. I'm used to go by myself to get some coffe, do shopping, walk by, go to the gym but before honestly I felt invisible yet in peace. Now I just try to flow along it and go my way but I feel weird when out of now where guys start chatting or stare directly and walk closer. Maybe is just that i'm not used to this.

Would appreciate insight from men, on how guys usually flirt when they see a woman. By the details mentioned is this considered "normal"? Thanks in advance.

How guys "flirt" with women in public places?
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