Green with dampness. Red is the most active color, blue the most passive; green, in the middle, is the color of neutrality and calm, sometimes used in architecture and design for these reasons. Blue and green together symbolize harmony and balance. Green is often associated with jealousy and envy. The expression "green-eyed monster" was first used by William Shakespeare in Othello: "it is the green-eyed monster which doth mock the meat it feeds on." Shakespeare also used it in the Merchant of Venice, speaking of "green-eyed jealousy." Green today is not commonly associated in Europe and the United States with love
Sexual jealousy jealousy in both males and females. In addition, some of these explanations can be used to explain the sex differences in sexual jealousy and why there may be differences in the degree to which people experience jealousy. Evolutionary psychologists propose that the core function of sexual jealousy is to retain access to a valuable mate. This explanation is known as "jealousy as a specific innate module", "JSIM". According to this perspective, sexual jealousy should be activated by threats to the relationship; in particular, threats of sexual infidelity by the female and threats that the male may share his resources (money,