What's the plural form of demisexuality? Here's the word you're looking for.
Answer
The noun demisexuality can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be demisexuality.
However, in more specific contexts, the plural form can also be demisexualities e.g. in reference to various types of demisexualities
or a collection of demisexualities.