Toby is neither gay nor bi
It's called pansexuality.
Pansexuality or anthrosexuality (anthro- literally meaning human, human sexual) (sometimes referred to as omnisexuality) is a sexual orientation characterized by the potential for aesthetic attraction, romantic love, and/or sexual desire for people, regardless of their gender identity or biological sex. Thus, pansexuality includes potential attraction to people (such as transgender individuals) who do not fit into the gender binary of male/female. Some pansexuals suggest that they are gender-blind; that gender and sex are insignificant or irrelevant in determining whether they will be sexually attracted to others.
Source: http://en.wikipedia.org/wiki/Pansexuality
If a bullet should enter my brain, let that bullet destroy every closet door. -Harvey Milk