This trope bothers me verily. This, I think, is a better description:
A popular plot where a set of twins trades places, or pretends to be each other. This can be to fulfill the other twin's responsibilities, such as a test or a date, or to experience the other twin's life in a Grass Is Greener
The advantage in having a twin is that one can pretend to be the other twin because of their similar or identical appearance. The disadvantage to all this, however, is that the twins in question are usually Polar Opposite Twins
— the wild one must pose as the book learner to successfully fool a boyfriend on a date, or the book learner has to be a party animal to fool their friends for example.
When this situation occurs, especially in a series, An Aesop
almost invariably follows. It's almost always the same Aesop every time: the twins learn that each others' lives both have their ups and downs.
One should note that in real life it is likely much less easy for twins to pull this off. They don't always have the same hairstyle, body weight, or voice.
See also Tag Team Twins
for a different
type of Twin Switch.
Be careful, there might be spoilers
both marked and unmarked.
edited 9th May '14 5:43:04 PM by Lakija
It is what it is.