Any woman that uses the "hurt by men" excuse had suppressed feelings that they ignored all along. You don't just become a lesbian because of pain. You choose to fall back on it because in the end you always wanted to at least experiment but felt shame or embarrassment and avoided it. The "hurt from men" is just that "final push" that allows them to feel free to express their inner most desires.

Girls who make out at bars do so nearly for attention. They get drinks and guys all over them because it's socially more acceptable for girls to engage in PDA because it's found "hot" and "extremely arousing". Again, any girl who engages in such behavior and would go a step further to actually sleep with a girl had the feelings before and is nearly acting on them. Sexuality isn't black and white. Some are straight. Some bi become gay. Some fluid.