I think it's a bit more than that: the Kinsey Scale exists because many people (probably most really) are somewhere in-between, even if they have a strong prefe

I think it's a bit more than that: the Kinsey Scale exists because many people (probably most really) are somewhere in-between, even if they have a strong preference for one sex or the other. A large number of women have probably always had bisexual tendencies, but these days with the impediments removed, they can more freely choose to explore their same-sex attraction and relationships with other women. After a few bad relationships with men, many have probably decided to only pursue relationships with women in fact. And why not? Women are generally more attractive (really attractive men are somewhat rare, but it's not as hard for most women to look nice), smell nice, are far less prone to violence, and these days generally have more education and better careers. They also are much better at being emotionally supportive in friendships/relationships and not depending on their partner to be a full-time therapist. As a bonus, they can even share clothes!