There he goes, making up words again.
I actually know the perfect example for you, Emu. One of my best friends is bisexual, currently in a relationship with a lesbian. Her mother is a lesbian (the only times she's had sex with a man was when she was innebriated). Now, this girl has had sexual relationships with men before, but now enjoys a rather actively sexual relationship with another girl. I highly doubt she would have been this way had her mother not been a lesbian, but this does bring up another question. Is she bisexual because of genetics, or because of her environment. I, personally, think it's more likely to be genetics, since this girl was also raised in a Catholic school setting, and had anti-gay propaganda shoved down her throat all her life.