It’s the TURNING AWAY – or perhaps the power to switch – that is so feared.
One good reason why society fears switch-hitting males more than switch-hitting females is really because this is the guy that is the transporter (or releaser) regarding the life-giving force (ie sperm). A guy ALWAYS needs to be stimulated by the sight of a woman’s human anatomy so that you can launch the semen to her. A girl need not be stimulated by the sight of a man’s human anatomy to get the semen from him. Launch is a dynamic procedure, reception is just a process that is passive.
Biology has put up this standard that is double. In the social degree, ladies exploit this standard that is double. In the act, she’s assisted to generate a bisexual dual standard which de-stigmatizes feminine bisexuality yet not male bisexuality.