Some people like fish, some like hotdogs, but there are folks who like fish as well as hotdogs. We call those people bisexuals. They like it both ways :)
Sadly, our society, especially the media, have a certain stigma about accepting bisexuality. They are treated as outsiders by many gay and lesbian groups, and straight people call them fags like the rest of us. A lot of people are forced into the closet about their bisexuality, even after they come out about their same-sex attraction.
There are many common misconceptions about bi people, including:
SocialGroups in Halifax include BiQueerHalifax.