There are many different sexualities in the bisexual umbrella. Damn this is going to be hard haha. Please correct me in the comments (please no arguments about whether bisexual is two or more, or two, or if polysexual is three or more or anything like that.)

This font looks really weird when I'm typing in it. Never mind. Okay, so:

This one is kind of obvious. It's in the name of the umbrella.

Bisexuality is when you are attracted to people of two genders. Although it is commonly used for male and female, it can be for any two genders.

Polysexuality is when you are attracted to people of three or more genders, but not all. Is that enough description?

Pansexuality is when you are attracted to people based on their personality. Aka you're gender-blind.

Omnisexuality is attraction to all genders. Although it's similar to pansexuality, you are not gender-blind in this case, and you may have a preference over different genders.