twincest

Slash (mainly) between twins.

1. Elladan and Elrohir, twin sons of Elrond of Imladris. From lotr
2. Weasley twins from HP

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twincest

The act of twins engaging in incest.

Twins having intercourse.

"I heard John and Eli got busy last night."
"Dude, they're twins!"
"Yeah, twincest."

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twincest

3rd person masturbation

Twins might justify twincest with each other by thinking of it as 'nothing different than masturbating from the 3rd person point of view'

Twincest between guys may often be referred to as a '3rd Person Shooter'

Mutual '3rd Person' Masturbation

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twincest

The fascination, lustful feelings or fetish with twins. Typically those featured in any adult themed entertainment.

"Did you see those hot twins online?"
Terry and Jerry are this week's featured twins in xxx.twincest.com.
The twincest I feel for those doublemint girls is beyond belief.

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twincest

When twins are in love with each other

Benji & Joel Madden (from good charlotte incase ya didnt know) - what a sight that would be...sadly the rumours arent true...are they...???!!?? ^_^ We'll just have to make do with the twincest fan fics!

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twincest

A suitable subject for Harry Potter slash fiction about a certain pair of Weasley brothers.

Fred/George = TWINCEST!!!

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twincest

twins having sex.. its so wrong, yet it feels so right

me and my twin have twincest. i fuck my twin, and enjoy it.

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