Polysexuality means that a person is attracted to more than one gender. For example, some people might be attracted to both boys and girls, or boys and non-binary people, or girls and non-binary people. It doesn't matter if someone is a boy, girl, or something else, a polysexual person can be attracted to them if they like them. It's kind of like having a big palette of colors to choose from when you're painting, instead of just choosing one. Just like how it's okay to like blue and red and green all at the same time, it's okay for a polysexual person to like multiple genders at the same time.