Why do some girls "fake" flirt with guys?

Doofey
I was wondering the exact reason or even the justification of why girls do this to other guys. To be clear what I call fake "flirting" is when a girl, often very popular, will approach a needy guy with poor social skills and ridiculously flirt with them, putting their hands on them and loudly asking them awkward questions. I don't know if they think it's fun or if they enjoy making a guy squirm but I think it is a horribly cruel thing to do. Many times I have seen it happen, a girl or group approaches him and "hits" on them. Not only do both parties know she is not interested at all but she forces them to react and they often have no idea what to do. It makes them feel stupid, awkward, and humiliates them in front of everyone. They often ask questions loudly so everyone can hear as well. To be clear I am not talking about and have no problem with a girl smiling and talking to an antisocial guy, opening him up and probably helping with his confidence. Though I'd like to hear your reasons if you do this or why you think it is done, I seriously hope you'll stop.
Updates
+1 y
To clarify what I'm talking about to some of the opinions. Think about this analogy. I ask you to give me a detailed description of quantum field theory. As these guys have no experience with the subject of flirting, the analogy will assume
Updates
+1 y
That you cannot tell me you don't know quantum field theory. If you avoid the subject I pursue it and ask why you haven't answered. Also assume everyone around you knows the answer like it is common sense and they are listening for you response.
Why do some girls "fake" flirt with guys?
13 Opinion