
Bisexuality Support Group
Bisexuality is a sexual orientation which refers to the aesthetic, romantic, and/or sexual attraction of individuals to other individuals of both their own and the opposite gender or sex. Most bisexuals are not equally attracted to men and women, and may even shift between states of finding either sex exclusively attractive over the course of time.
that article has many definitions but an equal opportunities form was "people with a physical and emotional attraction to both sexes"
I guess you know because you are attracted to both men and women, and it doesn't have to be in equal measure.