GIRLS: Do you tease boys? and if so, why?

Because they are rotten-minded twisted creatures who like to lure their victims with sweet lies and manipulation and once possessed, tearing their heart off with bare hands and sucking blood out of in just in front of dying bodies.

Seriously, what kind of answer would one expect?

It's often to lighten the mood, they might be nervous.
Might be wanting to flirt, but is scared of a rejection so she gets your attention another way.

Humor is the method that womans tend to in situations they cannot mentally handle.

yeah sure because they like it and it keeps things interesting and the conversation going.. perfect opportunity for some flirting