Is There a Connection Between Bisexuality and the Physical Physiology?

If physiology strictly determines sexual desire and attraction in terms of its object or the other, then there would be no way to deviate from the determined that's really important. For Freud, psychoanalytically, psychically, we all have these character traits of femininity and masculinity which is not about the generals but which is about sort of for him activity and passivity. One man can be active in relation to pursuing, say, the female loved object but also passive in relation to the f****** boss or his own life.