...but the truth is, it's really only oxytocin.
this is an article I found at geekslovesex.com:
Men and women who get a whiff of oxytocin rate strangers as more attractive and trustworthy, says a new study from University of Bristol, UK.
The hormone oxytocin is best known for cementing the bond between a mother and her newborn child. Humans release oxytocin during everything from labor to orgasm.In other animals the molecule also promotes social interactions and pair bonding.
New research suggest oxytocin may cement bonds between adult humans in social situations as well.
Theodoridou’s team tested 96 men and women in a double-blind placebo-controlled trial. After participants got either a spritz of oxytocin or a placebo, they rated pictures of 48 men and women for attractiveness and 30 for trustworthiness. Her team also tested for mood.
No matter their sex or mood, volunteers who received oxytocin rated male and female strangers as both more attractive and trusting.
Theodoridou’s study did not examine how oxytocin could affect social judgements, but she speculates that the hormone dampens brain activity in a region involved in processing fearful emotions, called the amygdala.
ABC News A similar study in 2005 suggested that under oxytocin’s influence people are more willing to
trust others with their money.