But the people having pre-marital sex aren’t 3 years old. They tend to be in their teens and older. If you want people to choose abstinence, make it more attractive, don’t just lie and hide the other options.
They do say that how you were as a toddler is how you will be as a teen.

And honestly, today, most teens make decisions like they are three years old. I agree you can’t hide the other options, but unfortunately, most of those other options aren’t shown their negative and evil sides, and are presented to them at an inappropriate age and maturity.
Secondly, I agree that abstinence should be seen as more attractive, but if it’s it taught correctly, it will be.

So many teens out there just want to truth and they can’t even find it because most programs and adults today don’t even give them the chance to learn about abstinence and chastity, since they figure they’ll “do it anyway.”

And it is very similiar to the icecream analogy that another poster gave. They say, well, here’s boring old abstinence and end it at that and then say, “Well, since we know that you won’t/can’t refrain from sex, here’s the how-to’s (then goes the condom on the banana, lessons on oral sex and pornography, etc).”
If you encourage a person to be the best person they can be, most of the time you will be pleasantly surprised.