Girls when you hold prolonged eye contact with someone in passing, what are you looking for?

Are you trying to see if he's intimidated by you and looks away? What if he holds eye contact for longer than 5secs? What if he doesn't smile at all but just holds eye contact for long? I always have girls looking at me and I just stare them down lol, no smile no anything and eventually they look away. Just curious as to what they're looking for. Thanks for your inputs
Girls when you hold prolonged eye contact with someone in passing, what are you looking for?
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