really good question. quite good. see, students, this is the kind of question you should be asking (packs up my bag) and it shows you're really paying attention (puts on my coat) this is how you learn, by being willing to dig deeper (backs slowly out of door) you know, I'm tempted to pass you right now just for putting yourself out there (gets into my car) you've really got a good head on your shoulders (buys ticket to the heart of Finland)
alternate answer
being cis is seeing an airplane cockpit's worth of knobs labeled "gender" and thinking, well, these seem important, better not fuck with it
being trans is saying "oh, what does this one do"
Alternatively, being trans can also be like seeing the knobs and thinking "some of those are fine, but the way they're wired underneath the paneling needs to be redone." So I replaced my testosterone with live wire.