The way that we see it is: imagine that you are a sheet of white paper. Having sex is like gluing yourself to someone Else's paper. Then, if you break up, you are tearing your piece of paper away from the other one, and what happens then? The paper tears a little. Sex is the closest that two people can get emotionally, physically, and spiritually. When you have sex, you are giving a piece of your spiritual heart away that you will not get back (theoretically... keep reading). If you keep giving your heart away, what are you gonna have left for your spouse on your wedding day? Not much. That's where God comes in. If you give your life to him, he takes your messed up, torn sheet of paper, and glues it to him, a brand new white sheet of paper, and he makes you whole, and like a virgin again. And let me tell you, it's impossible to rip Jesus.