The church I attend ( Wave Church in Virginia Beach, VA) is full of young people, in fact it kinda has a rep of being like a hipster type of church lol. There are older people 40 and older that attend of course, but the young people influence (18-30) and younger middle and high school kids. I am 27 and been apart of the young adult ministry for the three years I been at the church.
All my friends who are married that attend the church waited until marriage to have sex. They weren't damaged or oppressed by waiting. Like I mentioned a few times before, most Christians come out BETTER for waiting. The bonds with their significant others is stronger. Sex with your soul mate is all you need. Pre martial sex in my opinion just leads people comparing various sexual partners to one another and could lead to worse issues, like porn addiction, lusting after the wrong kinds of people etc. And again, what the bible teaches about waiting for sex has sound reasoning behind it, which I also went depth about on previous posts. But I am not gonna get back on that topic again.