When someone accepts the Lord Jesus into their lives they are in essence giving up their free will in exchange for the will of God. They are making a commitment to love the Lord and obey him by living a life that they think may be pleasing to him. The bible clearly distinguishes between living for the flesh (human desires) and living for the spirit (godly desires). The whole point of the believer is to build up or edify the spirit and crush the flesh.
but I see another law at work in me, waging war against the law of my mind and making me a prisoner of the law of sin at work within me. Romans 7:23
Therefore, I urge you, brothers and sisters, in view of God's mercy, to offer your bodies as a living sacrifice, holy and pleasing to God--this is your true and proper worship. Romans 12:1
Those who belong to Christ Jesus have crucified the flesh with its passions and desires. Galatians 5:24
When you give your life to Christ his will or rather what you may believe that will to be is now your will. The bible tells you that you have to struggle against your nature in order to meet the standards of this authoritarian deity who most of all demands obedience. For example, I don't think fornication is a sin.
fornication: consensual sexual intercourse between two persons not married to each other
Especially when two consenting adults decide to have sexual relations and do so responsibly. If they don't want a family and take measures to protect themselves then I don't see the problem. Or if they do want children out of wedlock then so be it. Marriage isn't for everyone and so I don't see it as a prerequisite for sex.
Your salvation is conditional!
This is the basic formula: God commands and you obey! There is no bargaining with God although it has happened in several biblical stories that come to mind. But here is the biblical response to those who dare question the Lord.
Woe to those who quarrel with their Maker, those who are nothing but potsherds among the potsherds on the ground. Does the clay say to the potter, 'What are you making?' Does your work say, 'The potter has no hands'? Isaiah 45:9
But who are you, a human being, to talk back to God? "Shall what is formed say to the one who formed it, 'Why did you make me like this?'" Romans 9:20
A careful reading of the scriptures both in the old and new testaments would make this clear. The fact that you call Jesus Lord indicates a relationship between a master and a slave.
Lord: a ruler by hereditary right or preeminence to whom service and obedience are due
The analogy of the potter and the clay are also indicative of this relationship of master and slave. The believer often refers to their work in the church or the ministry as "serving the Lord." There is nothing loving about being someones servant. Even if your master was good (which God is not) there is nothing like being a free man. Free to live, think, and feel as one wishes without worrying about offending an imaginary tyrant in the sky.
Even slaves who had "good" masters longed for their freedom. Man is a social creature who enjoys the company of others and likes to feel at an equal standing with his fellow man. Sometimes when I read the bible I have to check the title again just to make sure I am reading the right book. I swear I feel like I am reading the testimony of former slaves.
The biblical god supposedly delivered the Hebrews from slavery in Egypt only to make them slaves for himself! Essentially all they did was trade one master for another. Except this new master Yahweh was murdering them wholesale while at the same time telling them that killing was a sin! When you give your life to God if you do so truthfully, you subject yourself to him. He becomes your master and you become his slave.