TL;DR (too long; didn't read) sticky post
The basic basics you need to know: 0. We use the simplest and best definition of bisexual: attracted to more than one gender. Note that there's nothing in that about being attracted equally to all genders, or there being only two, or being sexual with more than one, or not being monogamous, or being unfaithful, or… If it's not about… Read more »