Bisexuality doesn't mean you have to be equally attracted to both genders, there is already a subdivision of bisexuality into "preferably heterosexual", "both"

Bisexuality doesn't mean you have to be equally attracted to both genders, there is already a subdivision of bisexuality into "preferably heterosexual", "both" and "preferably homosexual", this is merely more fine grained. The difference to heterosexuality would be that everyone is a little bit attracted to the same gender or other gender.