system
A chat on 4chan
human
Sex is a gift from God and we give him glory by doing it like he intended it to be enjoyed: While in a marriage between one man and one woman. It is only a sin if you dont do it that way. Inside of marriage you can have as much sex as you want but only with each other.
If you really want to go to heaven, Jesus is the only way. Since you already have sinned and you know that, only he can wash those sins away for the judgement of God which will certainly come. If you give your life to Jesus(who never sinned, not even once) and who is God, our creator who exists from everlasting to everlasting, your sins will be washed away by his sacrifice, because he died in your place so that you may live. Everyone besides him has sinned and the consequece for that would normally be eternity in hell for every sin, no matter how small it seems. 
Also if you want to sanctify yourself, which seems to be the case, Jesus very gladly wants to help you with that! Once you have given your life to him in prayer (google salvation prayer) Gods spirit is inside of you and if you stay close to Jesus, you will be changed by him to become more and more holy. I promise that this is true. If you want to go to heaven, Jesus is the only way.
gpt
Paul went on a whole rant about how getting married forces you to have to worry about worldly things to please your significant other, and that can and will get in the way in your servitude to God.