The scientists divide people into 2 distinct groups in order to define what is normal (heterosexuality) and what is an alternative to normal (homosexuality, lesbianism, bisexuality, transgendered). Of course since it’s politically incorrect to say that they say “alternative lifestyles” or something else vague and overly cautious.
Sexuality is determined by biology and environment. If a male or female child is hormonally balanced and has a healthy environment with strong role models that encourage normal sexuality then they will develop normal sexually. They will seek out the opposite sex because it will feel normal. If they have an untreated hormone imbalance and/or an unhealthy environment where abnormal sexuality (same sex, incest, adult/child sex, etc) is practiced and encouraged by weak role models then they will develop sexually confused. They will not understand the difference between normal and abnormal and they will seek out comfort wherever they can find it. Their sexual identity is screwed up. People who engage in bisexual activity are simply exhibiting one of the forms of confusion.
People who have grown up sexually healthy and well centered but find themselves in a situation where they are starved for attention and affection (such as prison) will often turn to homosexual or lesbian behavior. This is a result of environment.
Lastly, people are turned on by what they allow themselves to be turned on by. If you go there, concentrate on it, and sexualize it then it will become sexual to you. Lips are lips, tongues are tongues, and hands are hands and they all feel good if you let your mind go there.
The scientists are simply lumping all forms of abnormal sexual behavior together because there’s little difference between them on a scientific level.
Cassandra