How I Would Explain a Christian View of Transgenderism to an Unbeliever

To miss God's design is to sell ourselves short.

Let’s begin with the observable facts of anatomy. Males have different reproductive organs than females. More than that, the reproductive organs of males appear to be designed to fit together with those of females. If you took a class on safe sex in high school, your teacher (or book, or video, or whatever) almost certainly assumed that female reproductive organs had to be treated differently than male ones. Thus, every boy in that class was expected to know how to put on a condom, and every girl in that class was expected to know what the birth control pill does. I doubt there was much confusion in the class over why girls weren’t expected to practice with condoms on themselves or the boys weren’t asking questions about the pill.