1 Corinthians 7:1 Now regarding the questions you asked in your letter. Yes, it is good to abstain from sexual relations. But because there is so much sexual immorality, each man should have his own wife, and each woman should have her own husband.
Sex outside of marriage is called fornication. Remember that sex is a gift from God specifically for a husband and a wife for intimacy and procreation. There are boundaries when it comes to this and for good reasons.
Outside of those boundaries is where you’ll meet with sin. Therefore, those boundaries are there for your protection. Several things can happen when you cross those boundaries. Sex outside of marriage can lead to idolatry (putting sex above God), broken relationships, unplanned pregnancy, sexually transmitted diseases, and endless and unfulfilled pursuits of pleasure. This is the importance of maintaining your purity until marriage.
We often think that there are too many rules or that the rules are too strict, but they are actually there for your protection. If you can prevent one decision from changing the trajectory of your life for the worse, wouldn’t that make you happy?
Don’t let sex that was meant for a husband and a wife make things harder for you in life. Even with condoms, you can still find yourself in a situation that is not easy to get out of (let’s say you get caught or found out by your parents?) Your best form of protection is abstinence. Even if you hear about everyone else having sex, it is okay to be different. You can rest on the fact that at the end of the day you might have prevented something that could have changed your life.