Here is how I like to picture sexualitys:
Heterosexual is a door that swings one way
Homosexual is a door that swings the other way
Bisexual is a door that swings both ways
Polysexual is a door that swings some ways but not all
Demisexual is a door that only opens after it gets to know you
Asexual has no door
Pansexual is a revolving door
I hope that helped all of you!
(I don't think I included all of them! Sorry!)