Hi ScottHere,
KarateCowboy had a lot of good things to say. Let me add something to his response to the sexual purity question. After we have accepted Christ (as KarateCowboy talked about), Gods Spirit begins to manifest himself inside our hearts and minds. As we seek God and learn to yield to him, he himself takes control of those hormonal urges. This doesnt mean we are never tempted and never feel any urges, but it does mean that with Gods power there is victory, and as we seek him, the urges get weaker. On a personal note, I can assure you of the truth of this because, as a single guy, God has given me complete victory for over twelve and a half years (since shortly after I became a Christian). Have I spent all these years in a cold sweat biting my nails, bemoaning my deprivation? Hardly. I learned early on that the more I conform to Gods laws the more freedom I experience and the happier I am (The precepts of the Lord are right, giving joy to the heart. Psalm 19:8).
Of course, if God is just a distant and abstract concept to us, we wont experience his power and there will not be victory. God wants to reveal himself to us and show himself to be powerful and loving in every area of our lives, but he will only do so as we seek him (talking to him from our hearts, reading his word, choosing friends who also seek him, etc.). If we dont do this, we will remain out of touch with his power and we will not experience victory.
Im not trying to over spiritualize this, but in addition to what Ive said alredy, it is also true that satan wants us to believe that victory is impossible and that we have to just give in. As usual, he tries to drag us down with lies, but a lie has no power unless it is believed.
May you seek God and find in him the freedom that I and many others have found.