Oxytocin, often called the "love hormone" because of its connection to affection and cooperation, affects people differently:
Jennifer Bartz from the Mount Sinai School of Medicine, New York, found that it improves people's ability to read emotions, but only if they are not very socially adept to begin with. Her team also showed that oxytocin actually reduces trust and cooperation in people who are particularly anxious or sensitive to rejection. It can even alter our memories in different ways. It gives people fonder recollections of their mothers, but only if they are secure in their personal relationships. If they are socially anxious, oxytocin makes them remember their mums as being less caring and more distant.
The Dish 