Could you clarify, something for me? If a person is born with a penis and testes, it is male, right? And if a person is born with a vagina and a uteris, it is female, correct? As far as I know, the physical attributes each human is born with is not a matter of choice. After birth, humans have many years to make a decision as to what their sexuality will be or even may be born understanding what their sexuality will be at sexual maturity. Some may even identify as being a different sex than at birth. I agree that there are perhaps lesser or greater variations of bi-sexuality that permeate all human beings to a lesser or greater extent. The exploration and discovery about ourselves continues and will be either exciting or dreaded, depending on your views and experiences.