Which is probably a better response than ‘clothing blocks the majickal energies’. Ritual behaviour is all about separating the sacred activity from the every day, and you can do this via signifiers involving place, time or behaviour. In every case it makes sense to do something that steps outside of the usual norms, so ritual nudity makes a lot of sense in a Northern European country with a wet climate and a population who tend to be fastidious about being covered up even in the presence of close family members (less true nowadays but still more so than many of our continental neighbours).
