I honestly don’t believe in the “bisexual” label as statistics show that “most” lesbians have more male partners than heterosexual women. Only about 2% (I think) have never had heterosexual sex. All labels do is encourage “special minority rights” and are usually based on a lie.
I personally know two “bisexual” young women. Both have had relationships with males and females although not usually at the same time. One, my step-daughter may have just been going through a phase in which she was infatuated with a female friend when both were only 14 and too young to know what they were even feeling.