You dont have to know them all. Its just a comfort to people to have a label when you can’t otherwise communicate your experience :) (and in some cases it makes you feel less alone and weird for relating to people in a way you dont see anyone else experiencing)

And there are a lot of ways to experience sexuality and attraction (or to not experience it), so there are a lot of labels! But you dont need to know all of them

You can always ask if someone uses a label you dont know and you’d like to know (eg “oh, ive not heard that label before. What does it mean to you?”) and as long as you’re being friendly people usually take comfort in seeing someone interested in understanding them. But unless you’re in community with someone and want to understand their identity, its not neccesary to really know the various labels, nevermind have a complete list and know all of them by heart

Sending love from my corner of the world to yours ☺️ (signed, a person who’s maybe gray-ace :)