In today’s society jealousy can be sparked by a potential threat to one’s mate, social standing, emotional and physical well-being or resources. Infidelity, or the threat of infidelity, can cause extreme jealousy in both males and females. If an individual is in a position of social power and feels that that standing is jeopardized by another, it often rears its ugly head. Sibling rivalry is often a result of jealousy, with siblings vying for parental attention or resources such as food. It also appears in friendships, when one feels that they are losing the attention of their friend to another.