That may sound unlikely, but as researchers are discovering, a person's sexual orientation is not carved in stone. In her influential book Sexual Fluidity, psychology professor Lisa M. Diamond chronicled her research on 80 nonheterosexual women over a period of 10 years. During that time, Diamond discovered, a significant number of the women had reported changing their sexual orientation. The most frequent cause for the U-turn? The "switchers" had fallen in love with a member of the opposite sex.
These women were not unhappy being lesbians, but love, it seems, really can conquer all — including a person's lifelong sexual orientation up to the moment when she falls hard for someone of a previously ignored gender.
The research on men shows somewhat less flexibility. But Diamond and other researchers have compiled numerous case studies of gay men who spent years feeling (and acting) fully and comfortably homosexual, only then to fall unexpectedly in love with a heterosexual woman.