God is our judge, and, He's just. What others say to you, on the large scale of things, even, small, shouldn't matter much, if they are criticizing you about virginity or any other sin. Those are folks, the Lord leads, you probably don't want to be associating with. Job had friends and they began judging him and God was not pleased with these friends then of Job.
Just trying to say here that God Loves us and others who judge us of any sin are just not doing what the bible says we should do, and, it's Love one another. God convicts us inside our heart of things we do wrong, and, He does not want us to do the same to our friends, or, enemies, for that matter.
We just can't be God, only God can look at the heart of man, or, woman, we can try as we might but we will ONLY get as far as looking at outward appearances. We just can't see in to someone's heart and thoughts and ideas, and, this is especially the reason why we are not to judge others. Plus, Scripture says, quit worrying about the sawdust spec (of sin) in your brother's eye when you got a board in your own eye.
I think, there's much wisdom in that . When you are telling others that they have made mistakes becuase of having sex before marriage you are often with something in your own life that you made a mistake on that's even bigger.
We should Love God with all our heart, mind, soul, and, He wants us to live our lives with understanding that He will handle everything of sin that is done, we are not to brood contempt and blame on someone for something they've done. We are to come up beside them and let them know that we all sin all the time, and, we all need to bring our sins to the throne of grace, where God gives mercy to us all for bringing them to Him
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I think regeneratedman is just saying a general statement, he is not intending to bring acccusation to anyone, it might sound like it, but he's not bore judgment on anyone, he's just mentioned a way to go through life that will have one in a good way of doing things .