There are other models of sexuallity. Things like lesbian/gay/straight/bi etc. or hetero/homosexuality is one based on the relative attraction between sexes or genders... But one could also use the model that simply refers to the subject of an individual's attraction. Gynosexual , Androsexual, Skoliosexual or Pansexual. It's arguably a more neutral way to classify because it draws no particular difference between same-sex or opposite sex attraction. It also tends to work better when dealing with non-binary people because self classification gets weird when you need to use a binary classification system for a non-binary experience.