Parents usually think they know their kids and that they have a relatively good grasp of what they do and think. If you speak about kid’s love and sex life, parents are always a little less at ease, but they keep their confidence. A study from the NY Mag confirms that parents don’t know nothing.
A bit of advice: If you are parent to a teen, don’t read this study or you’ll learn a lot more than you’d like. More precisely, you certainly grossly underestimate the reality of your kids sex life.
Last note: Even if this is published by NY Magazine, it might not be considered safe for work (nSfW).