Twincest (ConceptTopic, 3)

From Compile Worlds

Twincest is a form of incest where the two partners are twins, possibly identical twins. Twincest is the biggest form of self love since masturbation and twice as awesome. Twincest is especially acceptable when it involves the Kagamine Twins, as it becomes wincest too! Any series with twins in it will have someone ship them together, and most likely draw them too.