Bisexual, in the most inclusive definition, means to be attracted to 2 OR MORE genders. Pansexual doesn't have to do with the number of genders, being pansexual means to be attracted to someone with out being concerned about gender, therefore Pan doesn't technically mean attracted to all genders, but that is how many might use it. I see in another comment someone mentioned omnisexual, but I just wanted to clear one part up because I used to identify as omnisexual before I figured out something that fit me better. Omnisexual is SIMILAR to pansexual, but not exactly the same. Omnisexual means you DO recognize gender but you're attracted to all of them regardless, whereas pansexual is considered "genderblind" as previous commenters mentioned. Hope that made sense?