By definition, bisexuals are people who are physically and emotionally attracted to both women and men. Around 3% of all people call themselves bisexual. [1]

Especially among homosexuals there is the prejudice that bisexuals cannot decide on one form of sexual orientation. The accusation of being neither fish nor fowl is often based on the immature sexual orientation. [1] [2]

According to a current study [3], women tend to be attracted more to their own sex than men. 74% of all heterosexual women were physically aroused after watching video recordings of naked women. Concerning the results, Gerulf Rieger, professor of psychology at the University of Essex states:

"Although the majority of women identify themselves as heterosexual, our investigation clearly shows that they are either bi- or homosexual when it comes to what arouses them, but never hetero". [4]
(translated by Christine Wilhelm)

Similar results are shown in Meredith Chiver's study [5]: Women physically reacted on media containing homo- or heterosexual material despite their sexual orientation. Men, however, reacted more specifically, that is, homosexual men were hardly or not at all aroused by heterosexual pornography. Indeed, the increase of sexual arousal was also measured in women when watching sex among animals. One explanation is that women are provided with an evolutionary advantage if aroused by any form of sexuality, in order to prevent physical damages in case of rape. [5] [6]

Sigmund Freud advocated the assumption that humans are bisexual by birth. Alfred Kinsey came to the result that 90% of all humans are bisexual. Both investigated the dominant norms and tried to comprehend the influence of socialisation and attitude to morality on sexuality. Freud assumed a bisexual image of humanity in which the homosexual parts were suppressed. Kinsey postulated a range of bisexuality between homo- and heterosexuality, in order to ease constricting thought patterns. [1] [7] [8] [HETEROSEXUALITY]

Various studies and theses show highly different results. What conclusions can be drawn from these contradictorily appearing statements?

The sexual orientation is a product of body and culture. On the one hand, there are norms, influence and personal liking and on the other hand there is a unique sexually arousable body. In the end, everyone should be able to decide for him- or herself how to define oneself and live this decision.