Early sexual activity associated with depression [ 17 ]
May cause changes in the brain [ 18 ]
May make it more difficult to emotionally bond with others in future [ 18 ]
Memories and flashbacks are carried into future relationships
Sex outside of marriage carries feelings of guilt, shame and uncertainty
Emotional pain of a broken relationship can last a lifetime
Depression rates and suicide rates for sexually active males and females

[ 17 ]    Hallfors DD 2005 Am J Prev Med 29(3):163-170
[ 18 ]    McIlhaney JS. Hooked

For more information on emotional consequences of sex click here. [ bonding 101? ]