Right, there are indeed involuntary behaviors. But I think there are plenty of examples of women that choose not to play hard-to-get - if it was involuntary we

Right, there are indeed involuntary behaviors. But I think there are plenty of examples of women that choose not to play hard-to-get - if it was involuntary we would have no, or vanishingly few, examples. If "voluntary" means anything - and I'm not talking about free will vs determinism here - this is one of those behaviors that is indeed voluntary.