This mind/body dualism is actually a very low view of the body compared to the traditional Christian view, which says the body is inherently good, created by God, and part of who we are, not just a shell we inhabit. A lot of Christians today have lost this understanding, but this has been the historic Christian view since the beginning.
This presents a powerful way to reach those struggling with homosexual desires or similar issues (like transgenderism) with a positive message that their bodies are not irrelevant to who they are, but are good and integral parts of their being. Our bodies do have a lot to show us about who we are because they exhibit features that have a design. Behaviors that fit with our design are good and behaviors that violate our design are bad - not just morally bad, but bad for us as well.
Rather than a negative message that they are evil and twisted for having same-sex desires, we can present a positive message that their bodies are good. Our design tells us how we should live.
For example, we can study the digestive system to see what it is for and how it works. But that study also shows us good ways and bad ways of treating our bodies. If we eat nutritious food, then our bodies are helped. If we eat junk food or overeat or binge and purge or starve ourselves, these violate the way our bodies are supposed to work and cause harm. We can see that anorexia and bulimia are disorders precisely because they violate the way the body is designed to work.
It is exactly the same with the sexual organs. Our bodies have a way they were designed to work. They are designed as either male or female and the sexes are designed for their sexual organs to fit together and through that action to create new life. Our desires or attractions do not trump the design of our bodies. If we treat our bodies incorrectly, it causes harm.
This is a high view of the body that treats the body as an important part of who we are and which gives us valuable clues about how we should live so that we can flourish. Note that we do not have to rely on Christian moral teaching at this point. This is an argument from natural law, which is accessible to anyone, even if they don't believe the Bible. And that makes it easier to reach those who are not Christians.
It is worth noting at this point that Christian teaching, not coincidentally, is in line with what we can see in nature. This is good evidence for the truth of Christianity. Christian morality doesn't violate our design. It fits perfectly.
For more arguments like this about the design of human bodies and human sexuality, check out my new book The Bible and Science on Gender, Sex, and Marriage.