White monster basically is the most popular flavor among femboys, trans, gays, gooners, sluts, furries, terminally online introverts, and the list goes on.

Because of the repeating consistency of it being the preferred flavor among so many groups it basically became a running in joke.

So white monster is both tangentially the “horny” flavor as well as the queer ally flavor. And people love their horny shit posting so it caught on as a fun joke.

It’s like how blahaj became a queer meme.

White monster is the same thing but horny.