I came a across this TED talk from 2011 and thought it was great.
Paul Zak – also known as Dr. Love – discusses the effects of oxytocin on human beings as he searches for what makes us “moral” and what makes us want to connect with and help each other.
Check it out – Paul Zak : Trust, Morality and Oxytocin- TED talk
Add 8 hugs a day to your daily health regime. It’s easy and apparently it works!