The problem is that most self-identified bisexuals don’t even have a 50/50 attraction for men and women. Most of them supposedly like both genders but "prefer" one over the other. Because of this, the sexuality itself is a vague way to describe someone. If you "prefer" one gender over the other, you are homosexual or heterosexual; nothing else, nothing more. I know some people would want to kill my view with Alfred Kinsey’s scale (the "sexuality is fluid" idea). Little do they know that it actually defends my argument! You see, Dr Kinsey actually tells us that sexuality can be exclusive, predominant, or equal. He uses the terms heterosexual and homosexual to describe this. Many people have a small degree of attraction for the gender they are generally not attracted to, hence the phrase "a bit bi." That is normal. If you read a good psychology book, they will mention that. For example, many heterosexual men are occasionally aroused by gay sexual activity, and that is fine. He is still heterosexual. He does not like men as much as he likes women. His love for women is generally overwhelming. Therefore, he cannot be “bisexual.” This also applies to those who might be really aroused by the same sex, most likely along with the opposite sex. They are still not “bisexual.” If they have no genuine attraction for the same sex, but are glad to date a member of the opposite sex, they are still heterosexual. Emotions, like sexual and physical attractions, also apply to a person’s sexual orientation.