@cultbegone - after rereading my post I see where there was room to take my statment as all inclusive regarding women. I didn't intend it to be all inclusive and should have added a qualifier to reflect "some women" or even "a few women".
@jwsaughter- yes i agree i have heard of cases where men also use (withholding)sex as a 'weapon' or tool to manipulate. It is not exclusive to women although i would suggest its more common amongst women, though i will admit i have no data to support that.