Quote by clum
Bisexual people are often portrayed and perceived as being trans-exclusionary. That's why labels such as pansexual, omnisexual and multisexual have started to crop up, when bisexual was always meant and used as an inclusive term. Indeed, the existence and use of these other terms is seen by many as biphobic. I've found it a really interesting thing to read up on, if you're interested.
The binary aspect of bisexual refers to "same sex/gender" and "other sex/gender". The latter group is as inclusive as one wants it to be. I guess a better label would be heterosexual, but monosexuals already confiscated that one ;)