In the blood

[image error]Wikipedia has a page on the idea that blood type predicts personality, a discredited theory that nevertheless remains widespread in Japanese and Korean popular culture.

The idea seems to hold a similar cultural position as star signs and astrology and is used as a form of platform for discussing relationship compatibility and vague personality characteristics.

This is from a 1998 article from the Journal of Cross Cultural Psychology:

For example, in Southeast Asia, one can find many ideas about...