Anon says: The Fandom can fight about “incest” pairings all it wants to, the real question is whether or not the people involved qualify for the Westermarck Effect. And I think alot of popular pairings (such as Spamo and UsUk) wouldn’t be possible because of the Westermarck Effect. The Westermarck effect is a phenomenon which has been observed in individuals who spend large amounts of time with each other under the age of six. People who are raised together, regardless of relationship, tend to become desensitized to each other, and they will not generally develop sexual attraction to each other later in life. A variety of studies have supported the concept of the Westermarck effect.

Anon says:

The Fandom can fight about “incest” pairings all it wants to, the real question is whether or not the people involved qualify for the Westermarck Effect. And I think alot of popular pairings (such as Spamo and UsUk) wouldn’t be possible because of the Westermarck Effect.

The Westermarck effect is a phenomenon which has been observed in individuals who spend large amounts of time with each other under the age of six. People who are raised together, regardless of relationship, tend to become desensitized to each other, and they will not generally develop sexual attraction to each other later in life. A variety of studies have supported the concept of the Westermarck effect.