1. "The McPoyles from 'It's Always Sunny in Philadelphia' are definitely guilty of twincest."

2. Person A: "Dude, did you see those two guys going at it? They looked exactly alike!"
Person B: "Yeah, man, didn't you know? They're in a twincestuous relationship."

I felt deep sonder thinking about the all the people who looked up this word along with me.

Benji and Joel are in alot of Twincest fics.

TWINCEST example: Hikaru Hitachiin and Kaoru Hitachiin
(if you dont know who they are, LOOK THEM UP)

The Visconti triplets practice twincest in homosexual pornography.

“I enjoy twincest porn.”
“My little brother and sister engage in twincest and I like to watch through the keyhole while I bop the ole’ chode.”
“Jaimie and Cersei Lanister on Game of Thrones have a twincestuous relationship.”
“Twincest is wincest.”