Let's consider those urges. Our sexual feelings are part of us and, thus, come from God. But we can respond in healthy or unhealthy ways. Be wary of the responses urged by our culture. Just watch people on television.
Sex is the first step after two people realize they are attracted to each other.
Just look at ads and billboards. Most aim at revving our engines. We live in a society where popular dress and popular media push our sexual buttons continually. But you can resist all this stuff, honest. As a religious, I've had to retrain and discipline myself.