There was in the city of Vienna (Austria) a famous psycholigist, Dr. Sigmund Freud. He was the first one who analyzed the sexuality of the people from the point of view of the brain. Before him, sexuality was a question for urologists and gynecologist only. Among others, he found out that from the biology, every person can get his sexual satisfaction, masturbating, having sex with an other person, from the other gender or from somebody of the own one. The rejection of one of these altenatives, does not come from the body, but from the brain. It is the brain, who says "you don't do that" for different reasons. But for the body is biological the same. If for example, a "full straight man", once beeing drunk or under drugs, let an other man to make him a blow job, he will get his orgasm. Same applies for women of course. That means, that biological, every body is bisexual.