If you read the article, the parameter set to define "abstinent" was no sex in the last year. I find it just as plausible that they might have contracted their STD prior to that window.
True enough. It always helps when you look at what the samples actually ARE, not what they are purported to be.
But most teenagers who have not had sex within the last year were hardly ‘abstaining’. If they were then every day of my life I am ‘abstaining’ from having sex with all the hot actresses in L.A..