I have a friend who thinks she is bisexual but she isnt sure. She says she masturbates to lesbian porn, but when she is done watching it the thought of two gay girls grosses her out. But she cant stop masturbating to it.I don't know what to tell her, since im not bisexual or gay.

Lesbian porn is hot, doesn't mean she is bisexual. Labels are funny that way, they don't always fit properly. She can enjoy lots of different types of porn, and get off on it. Doesn't necessarily mean she is ready to try it.

If it works for her, turns her on and it apparently does, then good for her! She should just enjoy it and not try to analyze it. Sex, and sexuality, is unique to each of us. We all have our personal preferences. If she's bi, she'll figure that out if the right lady comes along.

Point is, does it really matter?

I am the most heterosexual person on the planet. To watch sexual women who are physically attractive and doing sexual activities to other women can be a turn on. Not because of lesbian tendicies but because it is a turn on to see sex in general. To witness a women being free and open tends to spark the same in you. Women have beautiful bodies and it is not wrong or hard to imagine you as that same woman. It is just exciting to fantasize yourself as the same..as it would be to watch a man and women.
it is perfectly normal and healthy.
Tell your friend that she knows already what she wants, and it is not wrong to be turned on by witnessing sex in general.

k?

i am a gay, but somewhat different. I like to dress like a girl and do sex anyhow.

Completely agree with this.