Laura Stepp : Sermons against having sex ineffective ; almost all young adults have sex . U.S. has one of the highest unplanned pregnancy rates for single young women , she says . Stepp : The smartest way to prevent unwanted pregnancies is to promote contraception . 2011 : Ad Council campaign : fresh approach of humor and humor to help .
Laura Stepp : Sermons against having sex ineffective ; almost all young adults have sex . U.S. has one of the highest unplanned pregnancy rates for single young women , she says . Stepp : The smartest way to prevent unwanted pregnancies is to promote contraception . Stepp : Ad Council campaign uses fresh approach of humor and website to help .