What does it mean when I guy you know studies your face?

[KellyNight]

why does it mean when a guy studies your face and when you look at him he looks away?

[ValleyofDrakes]

He was enjoying looking at you in solitude but when you see him you've essentially ruined the image he was so keen on studying. There's no reason to look anymore. Also, it's rude to stare (apparently). No one wants to be caught staring. That's not even a male/female thing. That's a people thing.