Pride parades commemorate the first time that glbt openly fought back against police harassment: june 1969 a gay bar in nyc greenwich village. First gay liberation group in canada was formed in vancouver in 1970. They think of themselves as heterosexuals but engage in sex with both male and female partners. Sexual orientation a person"s erotic and emotional orientation toward members of their own gender or members of the other gender: homosexual, heterosexual, bisexual, asexual, a person"s attraction may not match their behavior or sexual identity. The term homosexual is derived from the greek root homo meaning same : may be applied to both genders or specifically to men. The term lesbian is used to refer to women and can be traced to the great greek poet sappho who lived on the island of lesbos and wrote love poetry to other women.