Most teens and young adults don't have very good self control when it comes to sexual matters regardless of wealth.

It doesn't take a ton of planning to understand the need to take birth control and ensure you take it the proper time every day. It also doesn't take a ton of planning or self-control to use a condom and there are plenty of kids who do. All it takes is an understanding that a bad decision in those moments can affect the rest of your life, the same decision-making process that helps you when making financial or business decisions.

This is purely anecdotal, but if I look at my friend group and my self. Those of us who are now "successful" all possed a certain level of self-control, even when we're younger. I think we all understood that if we got someone pregnant, it would make pursuing our goals much harder. I think its the same part of your brain that says, I could either go out and party tonight or stay home and focus on this skill or study. Or I can go spend the $100 I have on beer or I can save it to pay rent.