You thought "festive fiery photos" indicated a normal photoshoot?

[He hums softly. That's fascinating.]

Regardless, you don't have to worry about other people. The point is to submit your own look, and it seems that there's a minimum of discretion to match the theme, so you don't have to subject yourself to nudity. And if human nature is to be assumed here, there is a taste for every type. They'll appreciate the variety.