Why do girls start randomly giving a guy attention?

[Anonymous]

This girl started flirting with me by pretending to be mean towards me, but we both laugh at the end. It's almost like a teasing thing

[OlderAndWiser]

When girls pay attention to a guy, it is not random.

[Asker]

Why would she start giving me attention if she doesn't know me

[OlderAndWiser]

Same reason you would give attention to a girl you don't know.

[Guy13]

Two little kids on playground...