So given the volume of posts I've made about them and asks I've gotten, I have decided to make a masterpost of all my Tailscest posts (and any fan stuff that they inspired) just to keep track of it all.

Also, for reference, the "General Tailscest" category is a catchall for tailscest involving various different pairings, while the "Prime Polycule" category is specifically for Prime!Tails/Nine/Mangey/Sails posts

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General Tailscest:

The Tails variants live in Tails' heart, and Tails sees Nine in a dream (Tails/Nine)

"What do you think about a selfcest polycule between all of Tails variants?"

"Imagine the Tails polycule included all the versions of Tails not just the prime versions"

"How would the Tailscest polycule celebrate their birthday?"

"Which Tails selfcest pairing would make for the best couple?"

"How would Anti-Tails react to Nine?" (Miles/Nine)

"What if all the Tails across the media met up for a massive group date?"

"What if Sonic X Tails was into selfcest?" (Sonic X!Tails)

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Prime Polycule:

"What do you think about a selfcest polycule between all of Tails variants?"

"How would the Tailscest polycule celebrate their birthday?" (1.0)

"What was the Prime Tails polycule first kiss like?"

"Is a four way kiss possible?"

"How would Tails and Sails convince the others to try to make a four way kiss possible?"

"How do they feel when they succeed at the four way kiss?"

"What if Tails introduced the others to mints?"

"Which Tails selfcest pairing would make for the best couple?"

"Would the Tails Polycule like to dress as each other?"

"What would other characters think of the Tails polycule?"

"When the Tails polycule eventually treat the four way kiss as normal"

"How would the Prime Tails polycule first date go?"

"What would the Prime Polycule be like in The Murder of Sonic the Hedgehog?"

"What if Kit wanted to join the Tails Polycule?"

"What if the prime polycule stopped Nine at the end instead and he joined the polycule?"

"Who is the Tails polycule's favorite Sonic?"

"What was it like when the Tails polycule realized their feelings for each other?"

"How does the tailscest polycule celebrate their combined birthday?" (2.0)

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Fanstuffs:

Tails and Sails' first kiss art by @/kptya