[Kye]

It might have something to do with the furry community being queer majority from early on, and starting in a time where information security was a personal matter of life and death.

If actual research exists, Furscience might know: https://furscience.com/general-inquiries/

[PrismCrystal]

How early on is that? What I remember of furry culture from the early-mid 1990s internet was pretty straight, at least to judge from all the announcements of heterosexual marriages, all the porn going around, and prominent internet-furry voices. I was a bit surprised when furry culture saw a resurgence in wider internet culture during the Tumblr era and now was strongly linked to non-cishet themes.

[Kye]

Bi and similar are also queer. A lot of what appears "straight" is by and for people who are some variety of not monosexual. I've actually seen rants from people outside the fandom claiming it's "all straight men" using example art that I knew for a fact was made by someone who was neither straight nor a man.

Here's a good documentary that gets into the history of it: https://www.youtube.com/watch?v=iv0QaTW3kEY

[Jerrrry]

That and cultural specificities make furry costumes an intelligencia budget item