What does it mean when a girl pauses when you say hi to her?

[Anonymous]

As I was walking past one of my female co-workers I asked her "Hey, how's it going?". She paused and stared at me for about 3 seconds before she gave me an answer while smiling as she told me. This doesn't happen very often to me so I would like to know what this kind of thing means.

[Anonymous]

Does she do that every time you say hi?
If Yes then she's nervous around you and that may indicate she likes you
If No then maybe you're looking too much into it and she was thinking about sth else

[ImNotCreativeEither]

She wants your dick in her body. And no, I'm not kidding.