[description: the central figure in a nude lineup removes his censor bars]
Because I have nothing to hide.
Because I have nothing to hide.
There are a lot of practical reasons to go naked in specific situations (which I hope this project has underlined), but pragmatism isn't always the only or the most important factor in a person's decision on what to wear. You could be hot, you could be uncomfortable, you could be inconvenienced, but all of these could be worthwhile costs if you place some kind of metaphysical importance on covering your nakedness. So it's important to acknowledge that not only may nudists have good reason to go naked, but that they also lack significant reason not to.
I think this is what spooks a lot of people about nudists - that they lack the common "decency" to cover up. But a nudist would argue that this is an arbitrary taboo, and that there is really nothing indecent, threatening, or "sinful" about uncovering one's nakedness in front of others. In fact, it can be very healthy - not just physically, but also psychologically. And whatever justifications you can come up with for keeping yourself covered, there are justifications for not hiding who you are under your clothes that are no less legitimate. In the end, it really comes down to a matter of personal preference.