To be honest, I think that our ancestors in the Church had it easier in regards to sex than we do today. Urging someone back then to remain abstinent until their marriage was an easier task because people could get married at a much earlier age and not have to wait and fight the urges for so long. But now, telling someone to wait until they are married is a much harder task because we cannot get married as earlier in today's society. Most people don't get married now until they are 24-30; back then which would have been considered a middle-aged man. However, that is not to say that we still cannot learn from what the Fathers taught and apply it to ourselves, because, I think that we still can apply what they said in a practical way today, only, it is MUCH harder for us than it was for them.
That being said, as a former Protestant, my parents never really made sex that big of a deal. They never lied to me about it and told me the truth about what it was. However, they also taught me that waiting, at least in their eyes, was the safest option. But, that there are also contraceptives and that if I am going to disobey them, then I should at least be safe. I guess they sort of just left it as an option for me as to what I want to do. They've never stopped me from dating or have never prevented me from spending time alone from a female. They just hope that I make the right choices. I think that a lot of this sympathetic attitude they have comes from the fact that they had me before they were married so they do not want to look like hypocrites or lie to me in order to scare me into abstinence like most Protestant parents do. Even more strange is that my mother actually encourages me to date, while my father just lectures me all the time about not being stupid..