Why did girls make Out with girls?

Answer 1

Various on their Sexual Orientation, they may feel various attractions to people. So, if a person is Heterosexual, their hormones are one-intentional, then they shall feel Sexual Attraction only to the opposite Gender. Bi-Curious Persons haven't decided officially on their Sexual orientation, because they feel that even their own gender can be Attractive or how some others say, 'Sexy'. While Homosexuals feel Attraction to their own gender, so, they are defined in two different genres.

Homo/Gay : Homosexual Men that feel Attraction to Men only.

Lesbian: Homosexual Women that feel Attraction to Women only.

So, Lesbian Females will be kissing Females, and that is not weird.

Homosexual people may kiss another gender, or even have Sexual Interactions, but they will not be Attracted/They will not enjoy it.

Answer 2

It's because different people have different sexual orientations, it's who they are and who they are attracted to.