http://suntimes.com/output/news/cst-nws-kiss09.html
Saying no to sex has its pleasures 
January 9, 2006
BY ANDREW HERRMANN Staff Reporter 
Younger teen couples who do not have sex are more likely to report higher levels of satisfaction in their relationships, according to a new study.
Teen couples between 14 and 17 who stopped short of intercourse also reported higher levels of commitment in their relationships.
But for couples 17 to 21, those who are having intercourse reported higher levels of commitment.