An important philosophical feature of Christianity is that we have free will. So this actually works for Christianity. It just doesn't work in combination with modern science, because according to science, our sexual urges are very much outside the scope of our free will. This is a very deep and unsolvable dilemma for Christianity. A common solution is to take the middle ground and compromise, but then we both have free will and don't. Which is logically false. But anyhoo...